I just got it today and the underwire on the chest part was showing. The fabric is ok but I'm not crazy about it. The color is gorgeus and it looks fantastic on pictures though.
Size is almost accurate, I'm 5.41 tall, weight 140 lbs and my cup size is 38D so I ordered a large and it fits perfectly. The slit is really high but not high enough to show your underwear, I think it looks good. The dress is really long, even with high heels it is floor-lenght (I also like that).
Another negative thing is the back zipper, it looks bumpy when it's closed.
So I'm planning to make some alterations to it. Like someone else said, is a good option if you have the time to alter it.