I bought this when I thought I was a 34 DDD. Nope. So the bra doesn't fit but I still wear it occasionally as the design is awesome and retro. The band definitely runs larger than a 34 and the straps are slightly itchy, but the cups appear true to size and it is relatively comfortable.
The fabric is soft and very stretchy, and the design is pretty. I bought this when I thought I was a 34 DDD and I think that it would probably fit perfectly if that were my size. The shape the cups provide is not very uplifted but is more rounded than I was expecting given the appearance of the bra. With the give in the fabric this would probably be a good bra for someone just over a 34 band as well.
For an A cup, this is bigger than some Bs I wear in the same band size. It would fit (or, at least look) a little better if I had better posture; but with my slouch, the cups look like Linus's forehead. The straps are comfortably wide at the apex of the shoulder. The cup lining is extra comfortable.
The band fits a little more snug than other Amoena bras I've tried in this size, and it's not the most attractive bra. It's super soft and the straps are comfortable.
Good for everyday "office casual" wear barring thin, clingy fabrics (the seam across the center of the embossed cup and the fiberfill make it difficult to smooth out). It is comfortable throughout the whole day and very light weight.