Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not happy

This mirror, although the position is good when riding, is not practical. I was constantly trying to avoid hitting the mirror against anything such as a wall, pole or anything else. This is because it sticks out so much from the handlebars. You cannot flip your bike upside down to work on it with this mirror attached.There is road vibration also. It takes a long time to figure out what is going on in the mirror. For example, at night there may be three cars behind you. But because of the vibration, it looks like 6 cars because what you see is 12 bouncing lights but it is really 6 bouncing lights from three cars with two headlights each.Because of the optical curve, objects also appear different than in real life. So it is also hard to perceive depth. I returned mine and have a glasses mirror that works much better.The reason I give it two stars is if you cannot wear a helmet or glasses mirror, then this mirror is better than riding unsafely with no mirror at all.