The verdict is still to come as I've not slept on it for even a full 3 weeks. It is very comfortable so far. Unfurled and expanded completely and neatly within 48 hours. Yes, it does need to expand as do all box mattresses. No odor at all. My only issue is that it seems a bit shy of actual full/double bed size. My bed frame and sheets agree. However, so far I'm satisfied with the quality and I'm sleeping well.