Having recently locked myself out of my home while cooking- getting an electronic deadbolt has changed my life!  After having to call the fire dept, & having a traumatized dog (smoke alarm beeping- no fire- just smoke!), two days later I installed this Kwikset system.  
I am a senior female & installation took about 1 hour (it would have been less if I had an extra hand!) Instructions were good, but I actually installed it using the Kwikset 915 installation video on YouTube.  It was clear, concise & easy to follow.  
I would recommend this to anyone looking for peace of mind- Kwikset is a dependable, reliable product..