My nephew loves it, it fits well and it gave him such a confidence boost. Next, we buy a swim top and a half binder!
This binds a D chest to that smaller than some cishet mens'. I could not be happier than I am with how well this works. Admittedly the shirt part at my waist does tend to roll up, but I read that the fix is to tuck the whole thing into your pants, so I do that and problem solved.
So, this is my first binder, though its definitely confirmed my gender. I am non-binary, so I switch between masc and femme. However, I am also larger chested, so I never really get the genuine masc feeling I'm looking for. This binder did not completely flatten - nothing but surgery is gonna do that - but it made me look like a buff man after some readjusting. This was a wonderful experience, and the fabric is so soft and comfortable. So yeah, buy it, you're supporting a good company, can pay by e-transfer, and the product is very well made. Tho, getting it on should be considered a sport, and I needed help to get it off, so forewarning.
really great binder that looks good on its own too
Underworks Concealer Chest Binder - 988