I have a Kwikset 914 with keypad and love it.
I do use an 8 digit passcode so good luck guessing it (supports passcodes from 4 to 8 digits).
I don’t have it auto-unlock when I arrive home (just in case something on ST’s side goes crazy and changes presence on me like the hub reboots used to do).
The nicest part of the keypad for me is the lock button. I like being able to just pull the door closed and hit the lock button and know it’s locked behind me.
I do have it set to auto-lock 1 minute after the door closes so when I come home, I don’t have to worry about locking it behind me once I’m in (usually my hands are full when I come home, even from work).
I do still use my key to unlock sometimes, but I do have a widget set up on my phone to unlock so I can do it before I get out of the car (while my hands are still empty).
I re-keyed mine to the existing key (since I live in an apartment complex, easier for my maintenance guy this way).
To answer some questions @helios, you can have access codes programmed directly to the lock without ST, or you can have an app in ST program them and push them to the lock. These smart locks work without being connected to any hub if you just wanted a keypad (in fact they make keypad ones that do just that).
Here’s the lock code manager I use and it has a pretty good description and FAQ section that should give you more info: