Everybody likes the Xioami devices from the first look. The problem is that they are really intended for use with their own gateway, and can be “idiosyncratic” when used with other hubs. Meaning they can be hard to get connected and hard to keep connected.
FAQ: Help! New to smartThings: will Xioami/Aqara sensors work?
As it happens, the IKEA Tradfri are excellent zigbee repeaters and also work well to keep xioami devices connected to a smartthings hub. 