Instruct: Classify Amazon reviews into positive or negative sentiment
Query: good product but plan on regular maintenance

The keypad is a handy way to opening your garage door but using this product I have found that I had to at least three times a year clean the ribbon cable to keep it working. Unfortunately after cleaning this last time I am unable to remove what appear to be dark stains in the ribbon cable. Most likely it is water damage from the elements. I am bothered about paying near $25 for a new keypad when all I really need is the ribbon cable (which can't cost more than a dime) but the ribbon cable is attached in such a way that the entire thing needs to be replaced.A useful product but poorly designed thus the two star rating I am giving it.