Instruct: Classify an Amazon review as either positive or negative.
Query: Good voice quality. Terrible Keypad

After about 1 year of having used these units I can say that the voice quality is very good. The display on one of the units has gone bad. I can't recognize the characters on it anymore as a lot of pixels are not displayed.The keypad on one of the units is pretty bad. Sometimes when I press the keys they don't work at all. Then when I press the key hard, the key gets registered twice. This is very unpredictable and annoying when you are trying to dial a number or entering digits for an automated voice response system.