I'm a 25yo C cup who likes her girls kept snugly in place while doing high-impact activities.  I haven't been able to find my favorite Under Armour bra anywhere on Amazon, so I decided to try this one out.

My only negative comment is this: I actually wish I'd gone with the A/B size, but - again - I have a preference for extra snug.

Otherwise, it's great!  It's not flimsy like a lot of bras out there, and it also doesn't have the 50 snaps and buckles that you find with a lot of supportive bras (so I don't feel like it was made for someone 3x my age).  I don't personally mind uni-boob when I'm working out, but this bra really does separate nicely and looks surprisingly great in terms of separation if that's important to you.