This is a very good quality set and durable mouse cover at a very good price. My only complaint is that the base plate that comes with it has 2 posts that need to fit into a matching set of holes on the blade section. They're not straight (due to the riveting process used I think) and they don't go into holes. I just flipped the plate over and that's how it worked. Otherwise I would give it a 5. I would still recommend it. If your posts aren't straight, simply flip the plate over.