Best door lock for vacation rental

I use the eRentalLock. Just add a .com to that to check out their web site.
They come in a couple of styles (brass, nickel, bronze) and configurations (deadbolt, handle, etc.). They're a standard Schlage electronic lock with a chip built in that allows for remote configuration. Plug in the time and date for check-in and check-out and the site spits out a code that will only work during those times. Hint: Add an extra hour on each side, so as not to lock folks out for being a few minutes early or late.

I use these in my vacation rental and long term rental units. For the LTR, I can let people schedule showings on their own without me having to be on site all the time.