It depends on what features you’re looking for from your SmartLock. Alarms, AutoLock, Privacy modes, Flexible code lengths?
To get start I would recommend looking at the table in end of this post which compares lock features. Once you know what features you want it’ll become easier to choose your brand: [RELEASE] Universal Enhanced Z-Wave Lock Device Handler for Schlage, Yale, Kwikset, IDLock, Popp, Danalock, August Pro, Keywe, Philia, Samsung