Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't depend on Customer Service help

The control seemed simple and straight-forward to set-up, except when I needed to change the input source on the TV. Built-in help did not correct the problem. After three e-mails and a phone call I never did get a response from Logitech's Customer Service. Very disappointed in the total lack of response. However, after several attempts I was able to get the remote to work on my own. Aside from the terrible customer support, the only other issue I've run into is that the buttons are too small to easily manipulate.