I’ve been playing with a Fibaro motion sensor indoors since last night. The motion timeout and sensitivity is configurable within the device type code so it is already much better better than ST, MonoPrice, Aeon sensors that I have. So far I like it best. You can keep tweaking motion sensitivity to the right value to minimize outdoor false alarms. Indoors, sensitivity set to 15 is just enough to not pickup cats yet still pick up people at a reasonable distance.
The worst thing about the Fibaro motion sensor is the LED light that flashes when it detects activity. You can easily change parameter 80 to “0” to get rid of the LED annoyance and save battery. IMHO sensors should be as invisible as possible. In this regard, Fibaro did well by making this sensor the smallest I have seen.
The outer casing looks like it might survive outside if kept out of direct moisture. Like under a roof overhang.