Moving Comfort makes great bras and the Fiona is my absolute favorite running bra ever. However, I needed a racer back bra, so decided to try this one. It definitely prevents all bouncing of my 34Ds, but isn't quite as comfy as the Fiona.  The straps are nicely padded, but still rubbed a bit between my neck and shoulder at first. A little Body Glide (and maybe repeated washing) eliminated that issue completely. It is a little hard to get off when you're all sweaty, but that seems unavoidable with this bra style. Overall, I would recommend this if you must have a racer back; otherwise, go with the fantastic Fiona instead.