We have the Schlage Camelot, and the aspect we particularly like is that the motor isn't trying to drive the deadbolt, rather it just allows the deadbolt to be turned manually when the correct code is entered. This has a few advantages in that you can't get screwed by the mechanism freezing and not opening the door at all, and the batteries last quite a bit longer.
It's actually a nice lock, if you just want to leave the house without taking a key with you or give people access temporarily.
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