Just received this a few days ago. It's too early to tell if this will be able to reverse the progressive kyphosis that's curving my spine, but it certainly seems to be helping. And I find it to be reasonably comfortable. I try to wear it while I'm at my desk, because that's one of the places that seems to be chewing up my posture the worst. The instructions suggest that you ease into this, slowly increasing wear time. I'm doing that and so far I've had no trouble.
I used to have severe kyphosis and used to stay in improper posture, but this corrector push my back into natural alignment while it's comfortable to wear!
Really comfortable to wear and it stretches my back and shoulder naturally. Will keep to wear it for 2 months to get better results.
My son has been using it for over a month now, and it has made a difference. It's most helpful when he wear it while on the computer because that's when he tends to slouch the most. It's helped make him more conscious about keeping his shoulders back now. Overall, I highly recommend it!