Got mine today, and 30 minutes into using Betterback I can safely say it blows my mind.
From the packaging, to the clever pouch design to the actual usability it's a 5 star product! Tried all different methods for lower back pain and bad posture: fitness ball, wedge pillow etc. but this is far the most comfortable to use. My only concern will it strengthen or weaken my lower back muscles in the long run?