My mate had this on a corsa 2.0
It was pretty cool and you didn't have to stop the engine to get in. I seem to remember him saying that it is not thatcham approved though ie. If it is fitted with a thatcham cat 1 alarm then it would no longer be a cat 1!
This was a good few years ago and don't know if this still applies so check with the insurance company (or andy could maybe clarify) before fitting. If you can find a way around the clutch dipping!