I have started with 30 minute hit for over just a month and I already can feel the difference; healthier and lighter! I love the circuit, it's quick, effective and fun! I've always wanted to do kickboxing but was afraid to, but once I decided I need to take care of my health, I went and never regretted it! I made some new friends and the trainers are all wonderful! If this is something that you've always wanted to do, I highly recommend!