This bra is fairly  (but not completely) comfortable and looks pretty, but I can't say that it made much difference in cup size.  I wear a 36C and my shirts didn't button any better with this bra than with my non-minimizers.  I've had much better results with other products and will probably go back to another manufacturer after this.

Maybe it works differently for others, that sometimes happens. For me, though, I'd say that the support is okay, but if you are truly looking for a good minimizer this may not be the bra for you.