How good is the motion detection speed of UltimateSensor Mini?

Hello.
I’m interested in UltimateSensor Mini (UltimateSensor Mini | SmartHomeShop EN), and I am considering it for substitute some of my other motion sensors. In practice, my zigbee mwave sensors are fast enough to not need any PIR assistance, and I was wondering if this UltimateSensor Mini can be like that.
In the past, I read mwave sensors were quite slow at detecting presence, and that is not acceptable for the places I want to use it, so if anyone has experience and can share it, I will be grateful.