This binder is great quality and fits well (I got custom sizing). My experience with the customer service was really great as well. They were even able to raise the neckline for me so less cleavage would show. I would highly recommend this brand to others.
The only thing to note is that if you have large breasts, keep in mind that a binder can only do so much. In bras I'm a size 34J or 34K, which means my breasts are far too large to ever look flat (sadly). So this binder ended up giving me a uniboob like a sports bra (maybe I'm not wearing it correctly?). This was unfortunately more dysphoric for me than wearing my normal bra (this might not be the same experience for you, depending on your identity and preferences). I've never worn a binder before so I don't know if this is normal. But I don't think you can expect to look completely flat if you have a large chest unfortunately