I've got one on both my motors, got them from networx.co.uk. They work absolutley brilliantly but are now getting a bit well known. Would suggest you get a remote garage door, and tell Mr Plod that thats what its for if you get stopped. I got pulled on the A74 at Carlise and they got my local plod to come to my house (they didn't tell me this was going to happen). Good side is it means they have to put a squad car with the camera van which defeats the object, so I would say you would have to be unlucky to get pulled.

I was lucky as I have 2 garage remotes and one was in my car, I managed to activate it while they watched without them seeing it. They went away very happy and no charges phew !!!!!!!!!