It's difficult but not impossible. I walk out of there feeling like I've gotten a total-body workout. Plus, the coaches are amazing — they're motivational (which is crucial some workouts!) without being obnoxious and they really seem to take an interest in their students.
You never know what to expect, you do different exercises everyday. It makes fun to work out! You always know the coaches are walking behind you to help you do the excersises right, so you won't get hurt.