Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor instructions, difficult to use this product

This product is difficult to adjust, and what few instructions come with it are pretty much worthless. I bought 2 of these to use with oversized cups. By the time I was able to get one of them to adjust, the clip which held it to the size chosen was broken, so it is now worthless. Now knowing how to adjust it, the other one seemed to adjust fine, but the mechanism that holds the cup in place is not strong enough to hold the size cups of that size full of a drink; within a couple weeks, it was no longer the same size I'd adjusted it to (had spread apart about 1/2 inch farther. Although it does continue to hold my oversized cup, it wouldn't if there was a sudden stop or change of direction and probably isn't worth the amount charged for it. Maybe two of them should be priced at what is charged for each.