I have bought this bra many times over the years. It remains my favorite racer back bra. All day comfort, No straps falling off my shoulders. The band does run small, so I would suggest getting one size larger in the band than you normally order.
I ordered a band and cup size larger than I am as recommended. Although the bra fit, it offered little support. There is no padding and the shape of my breasts looked braless under my shirt. I may as well have not worn a bra at all. I promptly returned and am still searching for a racerback bra to wear under sleeveless shirts this summer.
As it's hard to find T-Back underwire bras, I really wanted to make this work, as I've had trouble with Wacoal sizing in the past. So I tried something different: Instead of ordering my normal size (34D), I ordered the 36D and it worked much better.
I bought this same bra years ago and have worn it out! It is light, comfortable, and perfect with summer tops and dresses (no straps showing). I bought it in nude and now I am buying a black one. I highly recommend.