34D here. I tried this bra on from sizes 34D to 32C and this bra just doesn't fit well. First of all, the cup sizes are just too big (although I think that's a problem with moving comfort in general). I actually like the velcro straps, although I'm still wary that they might come apart. The actual bra frame has poorly moulded cups that don't really hold your breasts in place. You really have to go down a size for the bra to give support, but at that point you may as well be using a compression bra. The encapsulation aspect of this bra is lacking.

The bottom line: Wearing two compression bras is better than wearing this one. I honestly wouldn't even recommend this bra for you A/B cups out there. There is just no support. If you want a good support bra try the Juno bra out (although be wary of sizing issues) and if you want a good running bra try the Shock Absorber Run bra.

I hope this review helps someone out :)