[BDG]

(or any other similar system)

Does anyone use either of these systems or done a comparison?

I'd like to know which is the best.

Can they be used on bikes as well as in cars, although realistically with the mileage i do it will spend more time in the tinbox, but it would be usefull if its easily transfered fron vehicle to vehicle so i can use it in vans when required.

Thanks in anticipation.