I found out about Spoofs when a friend of mine hired them for his wedding, and we had so much fun with the booth that I had to get them for mine too.
The booth puts out 2 copies of each photo strip, one of which is supposed to go in a scrap...book that people can write in for the couple. Some people decided to keep both copies, but that's no big deal because they sent me a dvd of all the photos after the wedding. Also, Patrick was super professional and did a great job handling my crazy family.
Everybody at my wedding had so much fun with this booth. They still talk about it. The best part about this booth is that it makes everyone look good. The lighting is just right and the camera is set slightly above the subject, which we know from the infamous "myspace photo", is a very flattering angle.
I haven't tried any other photo booth companies, so I can't say that Spoofs is the best, but I can definitely say that they are very very good. The fun factor at my wedding was upped 100% by this booth. I would have paid twice as much for it.