This is the most comfortable bra I've ever owned, and I have tried a LOT.  Most bras I'm ready to rip off after about 2 hours.  I feel like it keeps my boobs in a natural position, and the bottom band doesn't feel too tight or ride up. No part of it digs in. I wear it every single day, and I'm planning to buy another in case this one ever wears out (though I've had it for over a month now and it doesn't seem to show any wear).
Downsides would be that the material is thin, so your nipples show if it's cold. I've just gotten over this. I have nipples; deal with it.