Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A very lightweight and clear mirror.

I normally go into a long-winded dissertation when I review products, but there's not much to say other than this mirror is very nice and works great for me. Doesn't bob or shake too much when I'm riding, so I can still see cars behind me with ease. It's lightweight and stays on fairly well, though I'd recommend taping it on if you're getting into really rough trails or roads, because I hit a very hard bump and it did come loose. But it's only done that once, and not again.Return policy and warranty is excellent as well. Even if you screw it up by crushing it on accident or something, they'll still send you a replacement for a couple dollars (to cover shipping). I recommend many times over. It has kept me out of trouble since I usually ride on a winding country road with drivers who speed.