I was really torn between giving this 4 or 5 stars. While there are no real problems with the little printer, it's not "perfect", so I'm going to try to justify my 4 star rating.
It works great. Install the battery and film pack, charge it up, and go. I've tested it via the GL10 application on my Mac, and by transferring a file over BlueTooth. They both work exactly as they should.
Picture quality - now here's the issue I have. Since you're printing pictures, should the quality be the number 1 issue? Obviously you can't expect the world from a $100 pocket printer, so from my first couple of tests, I would say the quality is "good enough". Of course, I haven't tested different file sizes, and the issue I had with the first 2 prints may be that they are scaled down too much, and that is hurting the quality. The pics look great, till you get in close, and then you can see they're obviously digital prints. I still need to play with the input file sizes to see if I just need to pick an "optimum" size. So I'm going to rate this as really good for a $100 pocket printer. Much better than I had hoped, actually. But it may require specific size input files to get the best printouts.
The "film" is kind of pricey. Of course, you can get it on-line for less than list price, but $20 for 30 prints seems a bit high??? Of course, these don't require any ink, so again, that's debatable.
The one complaint I do have is support. The first printer I got was DOA. Would not power up or connect no matter what I did. No help files, FAQ, drivers, anything really on Polaroid's page. So, I used Amazon's great return policy and just ordered a new one. 2nd one worked fine. But the instructions say "get the GL10 application". OK, where? I had to do some searching to find how to get to the link. Just bad support/design, in my opinion. Their web page just has some very simple info on the products and a big "Buy Now" button. Where's the user manuals, etc? Polaroid, fix this, please.
Bottom line, this thing is awesome. I can carry it with my camera/cell phone, and as long as I have film and a charged battery, I can print directly from either my pocket camera, my SLR or my phone easily. Still need more experimentation with file sizes, I have a feeling that 13mega-pixel prints on the 4x3 film is pushing the limits a bit much, but that really is to be expected. Would be nice if they provided a recommended pic size, though. The manual isn't good for much more than how to read the status of the lights, and what the BlueTooth code is.