Pros:
They actually keep J size boobs in place while working out without needing a second bra
I have a second one I wear to keep the back pain at bay!
4 snaps in the back for larger sizes (WHY don't all bras have more snaps for larger sizes?!)

Cons:
It's hard to get the right fit on these and I always seem to have spillage on top no matter what size I try
The wires and bra strap can really dig in after a while or if you don't have it fitted just right