Can we please try and avoid going any further down the route of "you should / shouldn't install one of these"?
Last time it came up, we ended up having to recylce pretty much all the thread
Essentially, the fitting and using of a laser device specifically to fool a Police laser speed trap has been proven to run the risk of a BIG fine.
Quite how these people are getting away with advertising so blatently I'm not sure.
However, fitting a device which
really does open a garage door is fine - Audi etc actually offer that sort of thing as OEM option fit.