Instruct: Classify the given review into positive or negative sentiment.
Query: Works perfectly

I had my automatice garage door refurbished and needed a new digital key pad for outside access.. The installer said he could furnish one for about $50 and said I could probably do better buying one retail. At two major home repair stores I found them for about $40. This one cost about, if I remember, about $12 and works perfectly. Simple to install and program.