Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useless for towing

I was hoping I had found an inexpensive alternative mirror for towing the travell trailer. I was partially correct, it was inexpensive. They look good and the mounting to the factory mirrors is rock solid. The problem is in the CIPA mirror itself. The mount for the actual mirror in the housing is not very good and allows the mirror to vibrate so bad driving down the road that you can barely see anything. Even at idle in my diesel truck there is a little vibration, I can tap on the inside of my door and these things just bounce around with no movement from the factory mirrors. The only thing these mirrors are good for is backing, so if that's all you need they will work, other than that don't waste your money or time.