I'm somewhere around  38 DD-DDD and this bra is completely and utterly bounceless.  Caveat: there's no separation and sizing runs a bit odd so order one band size larger than normal and one cup size smaller.  That said, the shoulder straps don't slip, there's no poking underwire in my armpit, no pressure points anywhere, and the velcro adjustable shoulders really do make a big difference allowing for more or less freedom from bounce depending on your needs.  Now I can't wait to get the hell out of the office at lunchtime next week and start getting back to the gym!