I have been using this for 3 weeks now and while I have seen no difference in my measurements, my posture is definitely improved. I have also lost about 6 pounds, which is likely due to my combination of diet and exercise, but I have also been wearing the corset at least 4 days a week for up to 9 hours at a time. I am 5'9" 150 pounds and I bought a size Small and it fits how it should, super tight. I look forward to eventually going in to the second hooks.

My only complaint is the SMELL. It smells like rubber and while I hope no one around me really notices, I notice. I wear a wrap around my midsection underneath it, but after all day the smell still gets on and stays on my skin.

Otherwise, the construction is super sturdy and I anticipate only needed one for a long time. Hopefully the smell will fade with more hand washes...