Instruct: Classify the given review as either positive or negative.
Query: The only one that I found that works

I searched everywhere for an exterior lock for my sliding patio door. Home Depot has a crappy one that we used for a while and I was actually thinking of replacing the whole door till I found this one. We go in and out of this door all the time and I wanted one with a key lock from the outside, and this one works really well. A nice snap action lock and a good secure latch. Only problem I have is getting extra keys made. My local locksmith says I have to bring it in to match it, he can't positively identify the key blank alone. No big problem, only two screws but I'm also going to email CR Laurence to see if they can sell extras, it's a simple key with only a few tabs but it'll keep out the normal crooks.NDSHA10B - CRL Bronze PatioGuard Deadbolt Lock