Haven't worn it yet, but it looks great. I am a size small(35"B) and the small fits perfectly. It is not super thin & it looks great on. I just have to find out how to get all the wrinkles out of it that were caused by shipping it. They should have instructions for that, because Rayon is fussy and ironing it can cause heat marks.
I'm 5'2" and 200 lbs, I ordered the 2xl and it BARELY fit over my head. Also I'm kinda claustrophobic bc now it feels like the halter portion is choking me. It's also thoroughly see through so you'll have to wear a bra underneath bc the design of the shirt doesn't allow for a bra. And it's a wee bit short. All in all, I will wear it I guess but I don't care for it.