I like the overall style, love the background, the breasts are well drawn, the colors are great and the shading is too.
What I don't like is the model itself. It's just personal taste, but I find here to skinny and emaciated. And... I find the breasts a little to big for her thin body. And these fat legs... at least what is visible of them... like I said just personal taste. So don't worry too much about it (^.~) The drawing itself is wonderful (^_^)