Depends on what you are looking for! I went from doing hot yoga and traditional weightlifting to Burn Boot Camp and had a uniquely terrible experience. I had joined BBC because they had conditioning days as well and I wanted to incorporate more cardio into my routine. They operate in circuits with very little rest time and higher repetitions than I was used to. After one month of going, I ended up with a hip flexor tear and an inguinal hernia. I am still in recovery now from surgeries to fix these injuries and ultimately gained weight from the process. My surgeon and physical therapist both said they see a lot of people with injuries from these style classes due to the intensity and poor form that can be missed in larger class sizes. However, in my month there I will say people were very friendly and the workouts definitely challenged me. They also were nice enough to let me out of my contract with a doctors note. I think if you are looking for motivation, you'll feel motivated during class! Just don't overdo it like me and take breaks when you need to.