I also voted for the Philips Hue motion sensor. I like the battery life and the fact it can take rechargeable AAA and provide lux values.
I mostly have Aeotec/SmartThings motion sensors, which have been very reliable. I have been trying them out with rechargeable Lipo CR2, but I don't think battery life will be great as only 300mAh. So definitely prefer the Hue ones now.
