I hate them.
I hate the feeling of them digging into my shoulders and back, hate the feeling of the tags attached to them, and I hate it when it all doesn't fit, even when my bras are the appropriate size.
Thankfully, they've shrunk a bit since I've started exercising. They're much more shapely and less saggy than they use to, and this gives me full confidence, and it's much easier on my back.