I really like the deep open back on you but I agree with the others that the seaming isn't very flattering. I absolutely can't wear that type of silky thin fabric because it shows *everything* - I feel like I can't breathe or eat, lol.
I agree with the others, you can do better. I don't mind the "nightgown" look as much as everyone else (it's very Jean Harlow) but the proportions are slightly off so you aren't getting the most out of that style of dress. For example the seam in the back should be under your derriere not across it.