Very impressed with this item. It was more than I wanted to spend on something that I hope to not fit in eventually (due to weight loss). But I read enough positive reviews, so I took a chance. So glad I did! It is really well made, material is kind of like a wet suit, and it does not shift around which I was surprised and have never had a corset not do that! So definitely 5 stars   for me. I have an avg to long torso, am 59 and currently weigh 220 Lbs coming off from having my 4th baby  So I was looking for something that fit now, but with room to adjust a lot. I used the measurements chart and decided to size down from its recommendation to a xxxl (US sz 12) it worked out perfectly because I barely fit into the widest clasps of the 3 sets. I have been wearing it a week so far and I can already adjust it to the second row comfortably which was NOT possible a week ago. I don't sleep in it or work out in it like Ive read some do, but it gets pretty sweaty. I have a thin undershirt I wear between the trainer and my skin because it really does get soooo sweaty! Thankfully the sweat is contained under the device though, so its not like Im dripping or anything uncomfortable. I only know how much I have been sweating when I go to take it off. So overall fantastic product and I will totally buy again when I shrink to the smallest row of clasps.