I recommend the micro wheel. It has helped both myself and my mothers tight quads and hamstrings.
Hard to use at first but a staple in my work out routine
Does what it promises
Didn't change my life by any means but definitely helps where it claims to. My wife says I complain about my back less often...so that's a win.
No Back Pain But Good For My Posture
I Dont Know Why Everyone Keeps Talking About Back Pain Here I Think This Is Way Better For Posture