i was keenly interested in the system and received the dvd yesterday. i was excited to find a section specially for hamstrings - my big problem spot. i have tried everything out there and all the systems involve a lot of pain to get any improvement. from my first try with the hamstrings routines, i can feel that there is some improvement already - and with no pain. i am curious how far this can go. i used to be flexible enough to be able to do front splits by working 2 hrs a day of stretching when i was young. i lost all of that from running and from a hip injury. i have been working for 3 years to recover lost ROM but have been plateau'd for a while. my question is - will the flexibility just increase from doing the routines? it's almost unbelievable that the system is so simple and easy to follow!