I bought 2 of these, 1 in blue in a 28H and 1 in black in a 28HH. The blue one was nice but quite tight around the band (I can be a 28/30 so that wasn't an issue) and my boobs were kind of popping out. The black one felt more comfortable around the back - somehow - but it still felt like my boobs were ready to jump out and say hello even in a bigger cup. I guess it’s the type of bra, or the back (I recommend going up a size in the back).
The band does roll up considerably, im quite slim and yet I find myself being concious of any belly/back fat or movement that could cause the band to roll up. Very sexy look but if you were to walk around or play around in it you would see it roll up instantly and I feel like I’ll be constantly pulling it down. To be honest it does look so cute im contemplating keeping the black one and going up a back size in the red. Probably meant more as a one off bra rather than something to wear for a long period of time.