Not good for large breasts on smaller frame. I got two sizes since I didn't know which one to try and the smaller size the band was barely tight enough on the smallest setting and the cups were way too small. The larger size the cups were still a bit too small and the band wouldn't even come close to small enough. The straps are too skinny and dig into my shoulders since they're doing all the work that the band is supposed to do. Great concept, shitty execution. I'm sure it works great for the people who don't have a hard time finding good sports bras in the first place.