Definitely worth going at least once, if not multiple times. I'm planning on going every time I'm in Vegas so I can work my way onto more advanced moves. There was someone in the class who was experienced and was doing cooler moves! Even as a newcomer, you learn to do backflips from the trapeze, hang from your knees, and do a hand-off in mid-air.
The instructors were also really great and funny!
For anyone hesitant to try it out, it's definitely worth the time and money to do so! It's not something most people ever think about doing, but will be a lasting memory, and possibly a new hobby/sport! Then you can join Cirque du Soleil!
Although I do have a word of caution...you may be having fun during the class, but the next day you may be in bed, with sore sore muscles in places that you've never experienced.