Bought and used several Ezviz and Xiaomi. Price wise, almost the same as I bought within my budget and price range. Quality and app interface, I prefer Ezviz. I always need to power reboot Xiaomi camera after a period of time as it will lost its connection to the router. Ezviz never had this problem.

Depends on where you want to put it. For indoor I just put it somewhere above bookshelf. For outdoor, I just used strong adhesive for the mount as I don't want to drill, still stay strong until now, few years already. The camera is not that heavy, mine is indoor type, but I put outdoor under covered area.