I purchased this product having been convinced it was worth the exorbitant cost of $100 from a demonstration on a television show. I regret my impressionable nature. The thing is almost impossible to get on if you have relatively large breasts. It is not one size fits all - it comes in sizes which suggested to me it should be possible to get on even though I do in fact have large breasts. While I do not have back pain or other problems, I value good posture and loved the idea of being reminded to maintain it. Here is the rub: their unusual return policy. Most companies give you 30 days from the time of receipt of product. This company gives you 14 days from the time of payment, so when your charge posts. That date is before you receive the product. So, if you decide this thing is not for you, you are very likely to get a nasty surprise, finding out you are now stuck with an unwanted $100 unusable top. I wish I had not fallen for this. I can't afford to throw that kind of money away.