This bra is very supportive. I do have a bit of an issue with the sizing, however. I am a 34D, and CW-X sizing sticks my size in with the 34BC. So the bra does feel rather tight. And the next size up is too loose for me. Nevertheless, it is still comfortable enough for me to keep and use it. The mesh area under the bust helps reduce icky sweat-puddling. Also, there is a definite uniboob effect. But it isn't moving! Which for me is the most important factor.
Last weekend I bought the CW-X "Firm Support Bra". I went running in it yesterday and it is a wonderful bra. It provides outstanding support and is quite comfortable. I will be purchasing more of them in the future. Thanks!