We had such a great time, and I can't recommend it enough!! Kevin and Emily both definitely know how to perform hypnosis and how to put on a good show, and were very respectful to make sure everyone volunteering felt comfortable. My girlfriend and I both volunteered and were selected, which was a ton of fun. You absolutely should try to participate, you won't regret it! How many other shows can you say you were part of the experience?
The show is a good length and the venue is an intimate size which helps a lot (parking was free at the casino), though when on stage I didn't really notice the audience much (both from focusing and the lighting) and time really flew by. If you don't plan to participate I'd still get VIP tickets, which get you better and reserved seating. We also got the recording afterwards and got to talk with Kevin and Emily who were both super friendly and signed our poster. We told all our friends who were with us in Vegas afterwards and they were all super jealous and excited about seeing the show / volunteering for themselves. I'm 100% sure we'll all be returning the next time we're in town.