I'm also not keen on the dress tbh... is it a funny fit over the tummy?
I also think you look as if you'd suit a more exciting colour. Obviously we can't see your face though, so obviously could be wrong.
I think you have a good figure though and think you could do better than that dress, even for £50.
FWIW, I like the black shoes best with it, but I'm not mad on the dress.