I am 5'11 (and thin) and this leotard in a tall looks very nice! The back is very pretty but not too low. Although the bottom part is a bit small, the fabric is comfortable so I did not need to constantly pull it down.
This leotard is very pretty! My only complaint was the size and material of the shelf bra. The bra was quite big. Although I am a small chested dancer, there was a lot more excess material on it than all other leotards I have had. Also, the material for the bra was a bit uncomfortable feeling. It was more of the material of a stiff slip that you would where under a dress/skirt (very slippery, but kind of stiff). Since it was both big and a strange stiff material that was different than the leotard material, it kind of wrinkled up underneath my leotard. However, other than that, overall it is a great leotard!
I have this in spearmint, which is an absolutely gorgeous colour. The low back is flattering, and the material is soft and moveable. The only complaint is that even a medium was a bit baggy up top on my 34D chest, but that can easily be fixed by trimming the straps and resewing.