Is it the Juya one? I just got that binder in the mail too, but I find it doesn't work as well for me as my other binder, which kind of sucks. It seems to bind too high on my chest so my "pecks" appear to be a bit too far down for normal. Also, on the side with the velcro strap the fabric below it bunches out a bit. I found that I can get it to work okay by folding the binder up over itself so it becomes a short binder, but it is a bit disappointing. Did you have any issue like this? Even if you know how to fix that "fabric bunching" issue at the connection I could probably deal with the binder.
Aside from that, I am glad it works for you! I remember that feeling of first seeing my chest flat. That is one damn good feeling 🙂