I've been using a RAM mount for my Garmin Zumo XT (great GPS, by the way), but although the mount is fine, I never really liked the location on the left side of the handlebar. The Evotech mount is perfect, in the right spot and never in the way of anything.
The installation isn't that bad, but the instructions are a bit quirky. Sort of a sketched version of photos, and some things don't look right, which had me wondering if the package was missing something. But everything was there, and the result is a very nice, very high quality mount.