I have a Yale Conexis L1 on my back door (my front door is quite old and hasn’t got multi-point locks so couldn’t use it on that and I can easily use my back door as my main door).
The reason I went for the Conexis over the Nest x Yale (which I prefered and could probably use on my front door) was the Conexis adheres to the British Standard TS621:2018 which is the recognised UK standard for smart locking devices for homes. Quite simply, your insurance can be void if you don’t have the correct standard of lock on your door.
Overall the lock does its job, it locks my door and allows me access with keyfobs cards etc. It has saved me a couple of times when I left my keys at work. You do need to separately buy a Z-Wave 2 module if you want to use its more extended capabilities like app or SmartThings integration. It doesn’t work with Google Home/Apple Homekit but does apparently Alexa and as I said SmartThings. The main issue I’ve had is the battery draining fast when connected to my SmartThings but but I changed the Z-Wave 2 module and it seems better. It does have the prongs for a v8 battery if the lock battery is dead but generally it plays you a tune to warn you.