I am petite (5'2"/157 cm) with narrow-rooted, projected, evenly full and close-set breasts. My most common problems with bras are wires that are too wide, gores that are too high and wide and stab me in the chest and sit on my breast tissue, and cups without enough projection.
I tried on the white colorway in 30F, which gave me quadboob, the white in 30FF, which was a bit big, the black colorway in 30FF, which seemed a little small, and the black colorway in 30G, which was a bit big. At the time I tried these on, the Panache Jasmine in 30F and Curvy Kate Lifestyle Plunge in 30F fit me well, and I would say I was on the larger side of a 30F so would occasionally size up to 30FF.
I believe my problems with this bra were simply a shape mismatch. The wires were quite wide on the white 30FF, which can indicate a cup size that's too large, however, the 30F cut into my breast tissue at the top while giving me an "orange in a glass" effect at the bottom, leading me to believe that this bra didn't have enough projection and top fullness for me.
The gore was a good height and width though. It did sit on my breast tissue slightly, but since it wasn't high, it didn't cause me too much discomfort and didn't stab me.
The black colorway runs small, but not a full cup size small, as the black 30G is too large. I'd say it fits like a 30FF 1/2, so if you're a bit larger than a 30FF but not quite a true 30G, the black colorway in 30G might work for you.
Updated on Mar 26, 2019