Comes up a little small in the cup, the band is fairly true to size with quite a lot of give over time. The fit is nice and natural, though has a slight tendency towards 'pointy boob' - this isn't a big issue for me because of my body shape but on bigger busts it may be worth considering.
The central gore begins to dig in a little bit after a full day's wear, but I've yet to find many bras that don't give me some discomfort here at some point. It was minimal, and overall the fit was very good.
Fabric is comfy and the design is pretty for day without being too OTT. It has quite a textured finish though, so not great under fitted tops.
I loved the Curvy Kate Portia so much for my shape (full on bottom) that I bought 2 more in White and in Watermelon. The gore tacks perfectly, all my breast tissue sits firmly in the cups after scoop and swoop, and the straps are comfy. This is a very stretchy band, so I've thought about sizing down to a 32FF but, that seemed like too much work.