I was apprehensive to install a new electronic deadbolt because I thought it would be difficult to install, but I was wrong.  It was so easy!  We already had a deadbolt in our front door, so we were able to use the existing holes in the door and frame.  These matched up perfectly with the new deadbolt.  With only a couple of pieces to put together, it assembled quickly and easily.  The directions were clear to program a code into the door.  We haven't changed the code yet, but the directions seem easy to follow.   The lock feels very secure, and I like that we can enter with a key or without it.  The only caveat to using it without any keys is that you have to leave the regular doorknob lock unlocked.