This is a first class product. I bought it for my second car, to save me from having to take the original holder that I got with my Garmin Nuvi from car to car. It doesn't come with the separate plastic disc that you can stick onto a dashbord (that comes with the original), but as I use this one to attach to a windscreen it doesn't really matter.
Bought as a spare for 1450T following a broken one on another (elderly) SatNav; they simply aren't much use when this breaks! Same as the original supplied with the 1490T so no quibbles - I just hope I shall never have to use it.
I bought this as a replacement to the original Garmin suction cup holder (which disappeared along with my car one night...). It looked ok at first and the sat nav fit in the holder, but the suction cup mount refused to stick to my windscreen regardless of how many different positions I tried and how often I cleaned the windows to get a good surface. The rubber/plastic on the suction cup is far stiffer and poorer quality than the original Garmin product so it doesn't pull as good a vacuum and gives a pretty poor seal from what I can tell. I later went on to buy a RAM mount which was far better engineered and more versatile (I'd probably recommend that over the Garmin one, especially considering the price). I wouldn't waste your money on this to be honest... very disappointing.