I don't really see how the smoke/dry ice fits in with this image. It is obscuring most of your subject and the background that is visible isn't very appealing.
Really neat photo, great mood! Love the subdued colour, I just think the contrast is a little too low with a little too much negative space (ie crop a little more closer to rose while still maintining its off-centeredness)
Interesting, dreamy feel... I would have liked to have seen a crisper focus on the rose though. I think this could have been an awesome shot with a little closer view of the rose, with a bit more color with the "fog" swirling in. This looks like a very interesting setup that would be fun to experiment with.
I really do like the effect you used here. However, the position of rose doesn't seem right. Appears to lack detail. Perhaps turning it slightly to see more of the petal folds or having it upright would have been nice. Otherwise a nice shot.