I have had other keyless entry locks but with a knob so you have to enter the code and then turn the lock knob. This one turns the lock automatically but because it does, it uses too much battery power. I buy the most expensive batteries I can and it only lasts a couple of months. With cheap batteries, you are lucky to get a month. On the keyless entry lock I had prior to this, the batteries lasted more than a year. Other than that, it is a decent unit.