Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very good, but could be better.

The holder is great for attching to horizontal bars on walkers, etc. They are hard to come by. The dimensions of the clamp are slightly larger than my mother's walker bar but I just added tape around the walker to make up the difference. Once attached I hnoticed that the blue portion of the holder is a littler softer plastic and when a cup is placed in it, it tends to lean slightly. This can cause spillage on tall drinking cups if filled high. It is definately the best thing I could find and I am reasonably satisfied with it. It is serving the purpose it was intended to.