Machine is solid and performs as designed. I bought primarily for core stabilization, and I can already tell it will be good for that. I also wanted to see if it could help with my balance because of nerve damage from surgery in both legs - only time will tell if it helps but my guess is it will make a positive difference based on one weeks usage.
I purchased this for circulation, recovery of an injury, and to try and help me with flexibility. So far I have enjoyed the product but need to use it more to see how it is helping.