There is very little I can really say about this except it does exactly what it is supposed to do, it keeps my coffee hot when on the road and is ideal when your on a long car journey, the only drawback is that because of the design of our car we cannot plug it in on the drivers side as the cigarette lighter blocks the coffee cup, but apart from that, great innovative idea and well worth the money, considering after just a couple of uses it has paid for itself as opposed to stopping off at the motorway cafes for a cuppa.