I had this deadbolt installed by my locksmith (just because he was already here to do some other work) but he tells me it is fully user friendly.  He was pleased with the simplicity of installation and the quality of the product itself.  Provides for locking outside, with a key, or on the inside with the latch.  Excellent feature is the Smartkey technology that allows you to key this with all your other knobs, so that you're not carrying around a multitude of keys.  Nice matte nickel finish and the quality you'd expect from Kwikset!