I'm currently using a lot of x10 RF motion sensors for my automation. They actually work pretty well, but have to be programmed every time you change the battery, which is often, and they're not the most attractive.
Staring to look at zigbee and zwave sensors - I've gotten a thirdreality sensor, Centralite, and the new Aeotec (which I think is rebrand of the ST motion sensor?).
I wondered if anyone knew how they compare regarding horizontal and vertical angles of reception, sensitivity, etc.
I have a motion sensor on my front porch for turning on the light on the stairs. It took some serious work on the X10 sensor window with tape to get it to trigger when someone comes up the front stairs but NOT every time a car drives by or someone walks past the house.
One other question - has anyone successfully waterproofed any of the indoor sensors? I did pick up a hue outdoor sensor, but it's a bit pricey, and also rather large. I was thinking of trying to seal around the sensor with silicone sealant and some silicon tape where the units open.