We've own the August Smart Lock Pro + Connect twice now (once at each place we've lived in the last 5 years. The lock is super sleek and very easy to install. Literally anyone can install this lock. You follow the visual directions via the August app for install and it's brilliant.

The only con I have about this lock is that we are an Apple household and love its integration with Apple HomeKit although, they don't always place nicely. Sometimes the lock throws an error in the Home app. Sometimes it says it's locked or unlocked when really it's the other and sometimes it shows different statuses for different homeowners in the Home app. This has happened in both experiences and after lots of troubleshooting. So, we've chalked it up to the two just not worked quite as seamlessly as you might hope.

Still, this is the easiest smart lock to install yourself on the market as well as a great LOOKING lock that doesn't require you changing your locks/keys.