I'm a 36D and while the fit is snug, compression is totally what you need when you're a runner.  Even after 6 1/2 miles, this bra keeps me pretty comfortable and as bounce-free as I've ever get.  I don't have any problem getting it on any moreso than other t-back bras.  The color choice is great and the separation of the boobs is great!  The fabric is breathable and I have never gotten chafing from running in this bra, unlike the more expensive Donna Karan bras I've tried.

I accidentally ordered the non-underwire and don't make that mistake if you are looking for high-impact.  It's nowhere near as great as the underwire bra.