It definately does what it shows when it comes to creating a great image! I had a hard time believing what I saw in the mirror. My chest was up where they belonged and my back was as straight as my chiropractor would like it to be. BUT>>> It was so snug that it moved 4 of my ribs out of place under my chest and it moved 3 above, where the shoulder straps pull. They say pain is beauty, but it's not worth it when you end up in the ER thinking you're having a heart attack because of the movement of so many ribs. It has taken multiple vistis to my chiropractor and massage therapist to correct this damage. I am normally a 36 so I bought the 36-38. I had it on the loosest setting as well, so it wasn't like I was trying to slip a size 10 body into a size 3 shirt.