kenot just buy any brand and model.
later thickness incorrect.
i found out that yale brand got a special benefit if u use the same for grille and the wooden door........u unlock the grille the wooden door oso unlock together 

take this - 999+250 installation
https://shopee.com.my/Xiaomi-Aqara-N200-Sma...1691.5936168131

using it for half a year now. solid performance
can link with Xiaomi smart home stuff

abrain is too expensive for a non branded lock
aqara is a famous xiaomi sub-brand in home automation
why pay 1500 for a non branded lock?

no. the smart lock only locks and unlocks. all these is done locally. it doesnt need to be connected to the Internet
if you wish to monitor the status of the lock, then you will need to get a Bluetooth hub and connect your lock to it. This is solely for monitoring the status of your lock. And maybe to share a key....(not sure about this one)

btw the link i posted, i see they increased the price but nevermind you can get it from this other seller for 970 - https://shopee.com.my/Aqara-Mi-Mijia-Smart-...5082.4539763570

Not to me. Nothing is wrong with their locks. Just the price is too high. You can find similar locks for half the price or less.
Heck you can find branded ones for half their price. I bought Xiaomi Aqara lock for only 999 and this is one of their latest locks