I've been using the same 2-bra method as a lot of other large-chested women.  At 38D, I've always avoided anything that would create bounce (running, aerobics, etc).  But somehow I started running last year, and both of my go-to bras are nearing the end of their useful life.  (They're both just cheaper bras from the discount store.)  I've been reading reviews, trying to get the best I can buy (and not too afraid of high $ since I'd really like to be comfortable).

I found this bra to fit true-to-size (same 38D as I always wear) and had absolutely no problem hooking the upper clasp.  (I have a bum shoulder from an old injury, so was afraid based on the other reviews, but had no problems.)

The "padded" shoulder straps are not as padded as the everyday bras I wear.  (So certainly not "padded" like I expected from a sports bra.)  I didn't find anything uncomfortable about the fit.

The real issue was the lack of support.  The cups are thin fabric, and didn't provide any support themselves.  (There is also no modesty, which is quickly noticeable in this chillier weather.)  I ended up trying this bra along with the "inner" bra from my go-to 2-bra method, and the support was not as good as I am used to.

So in the end, this got packaged up to be returned to Amazon.  I was pleased with the overall fit, so may try another bra from this same manufacturer.  But at my size, I didn't find this sports bra to provide adequate support.