ilm came out, right after the upload progress bar is completed. (iPhone 6+) like the spec claimed, about 10 seconds.
2. rechargeable batteries, this makes it so much easier. never need to pay for the expensive batteries again.
3. standard micro USB port for charging. You can just plug the usb charging into a power bank, without any special cables. Pretty much you don't even need the rechargeable batteries at all. You can operate solely off the external power bank via USB cable. Unlike the SP1, you would need to get a special power cable to plug into the usb power bank.
4. Quality/resolution, this one is a bit iffy. I do have to admit the color is richer, and the blacks are actually black now. but I can barely tell the the DPI differences. Yes at some cases, the hair looks a little sharper and clear on the SP2. but you really have to look at it very closely to even see the resolution difference. As for the color, yes it is richer, and black is more black. it all depends if you liked that old a bit washed out film looks (sp1), or the more vivid color (sp2). that's just personal preference.

Overall wise I love the fast speed, battery, and USB charger. as for the image quality wise, I don't see a huge difference.
for the additional $100 over the SP1. I might wait for the price to drop a little before actually doing the upgrade.

You can view the image quality comparison with my attached images. I have labeled SP1 and SP2
hope that helps everyone to make their decisions.

一个SP-1的所有者，两天前才得到我的SP-2。做了一些测试和比较。  让我列出SP-2的一些升级    升级  1、超快的输出率。你可以听到它正在工作，而照片仍然被上传到打印机。影像出来了，就在上传进度条完成之后。(iPhone 6+)，大约10秒。  2、可充电电池，这使它更便利了。再也不用为昂贵的电池付费了。  3、标准的微型USB充电端口。你只需要把usb插入一个电源线，不需要任何特殊的电线。你根本不需要充电电池。您可以单独操作外部电源通过USB电缆。不像SP1，你需要得到一个特殊的电力电缆插入usb电源。  4、质量/分辨率，这个有点问题。我不得不承认颜色更丰富了，现在黑人实际上是黑人了。但我几乎看不出DPI的区别。是的，在某些情况下，SP2上的头发看起来更清晰。但你必须仔细观察它才能看到分辨率的差别。至于颜色，是的，它更丰富，黑色更黑。这完全取决于你是喜欢旧一点的褪色胶片(sp1)，还是更鲜艳的颜色(sp2)。这只是个人喜好。    总的来说，我喜欢快速的处理速度，电池，和USB充电器。至于图像质量方面，我没有看到很大的差别。  额外的100美元很值，超过了SP1。我可能会等价格下降一点再进行升级。

 您可以查看图像质量与我所附图像的比较。我标记了SP1和SP2  希望这能帮助每个人做决定。

r because the exposure is too high/low or I'm too close/far from the camera. The films are so expensive and it's such a waste. That's why I decided to get the printer.

The printer is amazing! I love how I get to choose the pictures I want to print out. The printer gives it a nostalgic look. I like how I can adjust the brightness, contrast and saturation to give my pictures a different look. I usually set the contrast lower and the brightness higher because the pictures usually print out darker. I posted some pictures I print out using the SP-2 as examples.

I would choose the printer over the mini 8. Although the printer is $100+ more, I think throughout the time the films I wasted on mini 8, the printer is a better investment. I hope this helps you making your decision!

note, if I use the camera and not being satisfied with the real time films, which happens quite often (imagine you take photos from your phone multiple times), that is such a waste of the films and I know I am not going to keep them or put them on display. The films come with a pack of 10 and they are not so cheap. I understand the excitement of having the instant camera and seeing the photos developed instantly but the disappointment of seeing the not-so-good pictures is greater to me than the excitement. 2) You pick what you want to print out from your phone, reprint them if necessary. With the instant camera, you have no way to save the pictures and reprint them. Having this printer gives me an ease of mind to take photos and pick the best.

I purchased the gold one and the color is beautiful. I use this printer with caution because I don't want to accidentally hit the opening button of the films (the films will be ruined) or hit the "reprint" bottom on the side. Unlike the instant camera, this printer is definitely not for kids to operate.

I have been using this printer and here are my tips for you what pictures might be printed with better quality. Keep this in mind that, and you might have known, the color of the pictures is vintage-like. That being said, the pictures will come out color-enhanced and a bit over-exposed. Therefore, you better pick the RAW pictures from your phone. For example, if you use iPhone, there are different filters (tonal, mono, fade, noir etc) for you to choose when you take pictures. Normally I choose "none" for the true color and this is the RAW pictures I am talking about. Don't get me wrong, if you choose the filters (special colors), they look really nice on your phone. But when you print out from this printer, they either look TOO DARK or TOO BRIGHT because the color was already enhanced from your phone. (See the attached 2 photos, one with filter from my phone and the other the printout came out too dark.) This also applies to the pictures you take from any photo apps or from Instagram in which you already edited or changed the color in some way. Another example is if your face is already over-exposed from the raw picture (like a hot sunny day at the beach and with no shade), that would not be a good picture to pick to print since your face will come out over-exposed. I also tried one of my wedding photos. It came out a bit blurring because the original one has a "soften" effect. That being said, any previous edited photos will come out too dark, too bright or a bit blurring. Some were not terribly bad but just not as good as I hoped from the original pictures. (Again, I am VERY picky with pictures.) Obviously, if your original raw pictures are not clear or in low resolution (depending what phone you are taking from), that will also affect the quality of printouts from this printer. Another reminder is after the film is developed, you will see the border lines not being fully developed (with some white lines if you look closely). I suggest do not use any clips on the pictures and do not put them in the album right away. Let them sit a bit longer (usually I let them sit overnight, just to be sure), the white border lines in the picture will disappear eventually.

So far I'm having fun with this little printer. I have not experienced any difficulties when operating this little machine except for the wifi connection is on and off due to for the time being that I am picking up which photos to print which may take a while. I suggest you know which photo to pick first, connect to the printer's wifi, and open the app and choose exact photo you need in case the wifi is disconnected while you're still choosing your photo. Some people are complaining about the official app. Unfortunately this is the only app that allows you to connect and print from your phone. I do not like any templates from the app but fortunately I only like to print the simple white ones with white borders. The app definitely has a lot to improve upon. The only disappointment for me is actually the black-and-white option. I was excited about this new feature but now not so much. I have not found the black and white pictures come out appealing so far. I give 4 star instead of 5 for this reason. I might need to do more experiment to jump into the conclusion though. Will update later if I find something new.

any photo you like and edit it as well. I also have a Fujifilm Instax Mini 8 and I often times choose the wrong setting, am in a poorly lit setting, and the photos come out bad in general BUT now I am able to take pictures with my phone (or any camera) and print it! In the app as well, there are multiple editing options as well as the ability to split a photo into 2 pictures! Also, before you even buy the printer, you can just download the app and play around with the settings and see how your prints would come out if you were to have a printer.
(Tip 1: prints usually come out slightly brighter than the original photo.)
(Tip 2 : you can use practically any digital photo you'd like but you must be able to transfer it onto your device to print it via the Instax SHARE app)