I tried on 30D and 32C. The cups are the same size as expacted but the bands were so tight that I kept the 32C one. After a few times wearing the band is too large so that I will shorten it. I recommend buying the smaller size and using an extender.
The band is compared to other english bras about one size small, the cups are about one size big, at least for my FOB breasts. The lace is scratchy but the color blends well with my skin tone, its seamless, the bra can be washed in the machine and it is okay for the occasions when I need an invisible bra.