Sizing
It's a little weird.  I was a 38D before pregnancy and according to the box I should have gotten the S/M combo, but this fits me fine.  I have it adjusted down fairly far, but there is still more room to tighten further if I need to.

Inconspicuous?
No.  The outline of those flange-holding things on the front is very visible through any light to moderate weight shirt.  Therefore I take it to work with me and put it on as I begin every pumping session, then take it off when I'm done.

Comfort
Nice. It's soft cotton and doesn't have any annoying tags or rough bits.

Adjustability
Very nice.  Back panel is easy to adjust.  Front zippers move smoothly and easily.

Color
Why must everything be pink?  Why?

Convenience
THANK GOODNESS FOR THIS BRA!  (Although it's line dry only, which is a bit of a pain in the rear.)