Phenomenal, and SO worth it!
Wow - what a powerful little device! Wish I'd had this YEARS ago during my time at a sedentary desk job, before that job did much damage to my body because of the posture that comes as part of that type of computer/desk work. However, I've got it now, and it's doing an amazing job of helping me combat the poor posture habits that job created, and lessening my pain associated with that poor posture along the way. SO glad I have this!