It was super easy to get in contact with InsideOut and the process to book them was straightforward and painless (book via website, can pay with paypal, small deposit fee, and balance is due 2 weeks beforehand). They were always very responsive... via email. Also, their pricing is competitive and there are no hidden charges.
The two attendants arrived on time and the booth was set up pretty quickly. Sadly, I didn't get to use the photobooth very much (hosting duties), but my guests loved them! They were very happy about the unlimited prints and the fact that you got to choose which pictures you wanted to print out. The attendants were very sweet and courteous. They made sure people fit inside the photo and were very accommodating for retake requests. They stayed mostly behind the scenes and there were no issues with the booth at all for the duration of the event. They were so inconspicuous that I didn't even realize when they had packed up and left!
Quality of pictures are pretty good. The only suggestion that I have is to include more variety in the types of props. I didn't request any specific types of props, so that may be my fault, but there were too many similar ones in the pile (sunglasses, hats, wigs) and there weren't too many that caught my eye.
Overall, I am satisfied and would recommend them for your next event!