I bought this bra because of the positive reviews from other big busted ladies. This bra has its good and bad points. On the good side, bounce is completely eliminated and the support is great. The lack of an underwire is actually a positive thing for once. It does a pretty good job of wicking away sweat so you can actually focus on the workout instead of how much you want to rip off your gross bra. It also hooks in the back so you don't have to worry about the inevitable moment of terror when you're stuck with one arm up in the air and not sure whether you're going to need help pulling the thing off over your head. The bra goes through the washing machine just fine, I don't even use a lingerie bag.
On the bad side, it's a uni-boober. It's reasonably comfortable when it's on but when I take it off my breasts actually hurt for a minute while blood circulation resumes. I guess that's the tradeoff for awesome support. My biggest problem with this bra is the paranoid backup snap. The bra fastens with two normal bra hooks (which are plenty in my opinion) but has an extra flap of fabric that closes over those hooks with single plastic snap. That stupid plastic snap does not stay snapped so you're left with a flap of fabric that feels like a bug crawling on back during the entire workout. You can't wear the bra without a shirt because of the flap and you can see it as an ugly bump through your shirt. I'm going to try to remove the plastic snap and sew on a new one of better quality.
February 2011 Update: Six months later this bra is ready for the trash. The seams are coming unravelled and the whole thing is falling apart. I've probably only worn the bra 20 times but I can tell a big difference between the level of support now and when it was new.