Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can't give zero stars, eh?

I've had this thing for about 3 weeks now and haven't been able to use it. I managed to jimmy-rig the mirror to my car's backseat as the directions specified, but it's impossible to see it from my rearview mirror. The thing falls down even before I can get the car to move. Sounds like a great design, but I really wished I had read the reviews before purchasing. Great in theory, but just shoddy engineering.