The binder actually fits really good, I ordered a large despite being more of an xl (in between sizes) because i had an older binder that was a size large and it still fit me. It was super tight at first but stretched out to a good comfortable size after only like 2-3 wears. It’s stretchy so I haven’t had problems with it squizing my ribs or compressing my breathing. The only thing id say is theres a few spots where the stitching came undone when i stretched the fabric with a tiny bit of force but its still very much intact and not coming apart at all.
I will say that the luxe version isnt too much better than the regular one so if you want to save a little money and/or dont care about having softer fabric and more stitching then i would just get the regular one. I just got this one cause i had the money at the time