I have been using this style of deadbolt for the past 14 years. Currently have 2 on my house and just purchased this one for my garage. I love the features such as vacation mode, up to 6 user codes, changeable programming code and being able to turn keypad beep off and on. The main reason I love this product is the battery last for a very long time due to the fact you have to actually turn the lock by hand. I actually prefer this because then I know the lock actually engaged and extended the full length. I have tried others with motorized locking mechanisms and the batteries constantly needed changed and if the door wasn't shut all the way it wouldn't like and you wouldn't know it.