I've been on the hunt for years for a non-wire bra with no padding.  My other sports bras are just too heavy duty for my needs, I don't like being smushed flat, and they're so stinking hot.  Fitness activities or not, this one is great for all purpose wear.  It breathes, and is smooth under light tanks and tees for casual wear.  It's supportive without binding or pinching, and doesn't ride up while running, lifting, or stretching.  I'm a A+/B-, and there's no bagging, but there's still a lot of stretch if one needed it.

I'm not a go-to-the-gym-in-a-bra person, but since the cut and coverage is flattering, I'm sure I'll be working in my yard this summer without a tank over it.

As far as the other reviewers concerns:  After a few washes with less than ideal treatment (I'm horrible at following labels' instructions), I haven't had a problem with pilling yet...  I don't know what size the four star reviewer is, but I'd guess even a large B/small C would feel supported running.  Even if you're larger than that, this would still be great for low impact yoga-type activities.

I loved my first one so much, I ordered a second, and I'm going to order a couple more.  I also got the matching fitness hipsters and thongs, and I'm happy with those as well.