I have had the RAM GPS mount for a year now and it is great. The construction of the RAM mount is heavy duty and very well made. I have the GPS mount on my Yamaha Vstar and use it with a Garmin GPS unit. It´s nice having the GPS on the bike when riding the back roads.
The RAM mount is powder coated and has a wide range of adjustment. There is a top and bottom swivel ball that allows you to position the mount just right. To adjust the mount just loosen the thumb screw and move the GPS mount to where yo would like. Then tighten the thumb screw and it is locked in.
I highly recommend the RAM GPS mount. Just be sure to order the correct mount head for your particular GPS model.
RAM also makes all kinds of other mounts for gadgets you want to stay put in motion.