I've been a member here for about 8 months now and I've gone through 3-4 rotations of workouts (each lasts about 8 weeks but you can start at any point). The trainers are very helpful and fellow class participants with more experience have also been great teachers. I won't lie to you. You will work hard here but you'll do it with the group, with a partner or occasionally on your own, but the results are worth it. Your body will probably hurt (a lot) the first week but you will come back for more. Go to at least a few of the mobility/stability classes to learn how to increase your flexibility or range of motion and relieve those sore muscles.
I'm in better shape now than I've been my whole life and I thought that I was in decent shape before I started. Um, yeah, not really. There are still days when the workouts just about crush me but when that happens, I just do what I can at a pace that works for me and it feels great.
The workouts vary from day to day and week to week, so you don't get bored. You will work lots of different muscle groups. If competition is your thing, you can do that to try to move up the leader board or you can just focus on doing better than you did last class or last week. The 30 day challenges are a great way to get to know the place and how classes work with no long term obligation if you don't like the results.
I've never been a member of any other type of gym, so I have nothing to compare this to. All I can say is that I've toured the traditional mega gyms and never joined. The first time I saw Monkey Bar in action was actually years ago as part of a class trip with my son's school. My thought at the time was that school gym should have been more like this.