We have been using this one for a while and it does a great job. Works with SmartThings, Alexa and has an app that uses Bluetooth to help manage user codes, share keys and send notifications about who is coming and going.
Honestly I would go with a Z-Wave+ lock like the Schlage Connect or Yale Assure (with the Z-Wave module). They work great with SmartThings let you set guest and one time codes and even schedule access times. Plus you can still monitor everything without needing that bulky August retrofit setup.
RBoy
(www.rboyapps.com - Making SmartThings Easy!)
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There’s a table in the first post here that helps you compare features of different Zwave locks, agree that August has limited features. Yale is far superior IMHO