I also own and wear this in a 32GG (pre-weight loss size) and continue to wear the bra even though my regular go to size is 30G these days.
Please see my review of the 32GG.
I find the 30G to be a great fit and quite true to size. The back is firm - I find it a little firmer than the Panache Sports bra which I wear in a 28 band (but that could just be me!) but what I would expect of a 30 sports bra band.
The breast separation is a little better than I expected in this smaller size. The cups dig in a tiny bit towards my arms. I think this is because the cups come up high rather than the cup is too big. I get this problem in a lot of bras however so it may not trouble you.
This bra is not owned any more
Updated on Jun 07, 2012 Flag this