Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Great idea; poor execution

For the 8 months this device worked, I had complete relief from shoulder and wrist pain from mousing. Unfortunately, from day one, I was disappointed in the quality and feel: the hard, brittle plastic, the clunky button 'action,' and the huge footprint. And it took only six months of reasonable use for the low-quality cable attachment to result in intermittent circuit breaks. For the price paid, I expect a good idea AND reasonable quality. It's still a good idea - too bad the quality of this device is awful.