SnapCam did a great job at our wedding. The photo booth itself was sleek and aesthetically pleasing, they were flexible and helpful with choosing our backdrop, and they put together a very cute scrapbook album with the USB drive at the end of t...he night so we could very quickly and easily see all the photo booth photos immediately.
The only flaw I would say is that the machine lagged a little bit and when I took the photos with my groom, I thought it had taken the photo, but it was a split second later than I thought! In the photo, I'm blinking, moving towards the camera, with my mouth open, mid-sentence. :-/
Otherwise, the customer service was great and no other guests photos came out weird, so maybe it was just me!