Hello,
No experience with this one as well, but ability to control an external light (as non z-wave version) directly (relay included) + reporting movement using z-wave looks interesting for a lighting PIR replacement (i.e having AC power). Don't know if this one have a config file to describe the device for OZW, but if this needs to be done documentation also looks very good and there is range+sensitivity tuning (usually, you only have sensitivity).
https://www.steinel.de/out/steinel_rela ... 043503.pdf
Drawback for standalone use is this is not a battery device (+ for an alarm system, AC off = no detection).