Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Practical, but poorly constructed

I bought two of these, one for each of two HTPCs. The first one died after roughly a month. The second one, which I've been using for about a year now, works, but here are the problems I've noticed with it:--The signal becomes shoddy more than just a few feet away from the TV, so I find myself constantly having to leave the couch to type.--The keys aren't very responsive, particularly the mouse buttons, and this has gotten worse over time.--The trackball sticks.On the whole, I'm disappointed.