What a convenience not to worry about carrying a key. Lock is so easy to lock, just press one button and you get a visual confirmation that lock is set. 
What a convenience to let someone enter your home, like a repair person or cleaning person with their own unique code, which can be programmed for a specific time and then deactivated. You also have knowledge of the date and time of entry and exit. Wow, why didn’t I get this sooner!!