The CGE is a lot bigger than the CGEM or the ATLAS. If you have never seen one, it is a monster. A very fine mount, but definitely at the edge of portability. The CGEM and ATLAS are much easier to move around. I went with the CGEM mainly because it is made by the same company that made the ATLAS and I knew the ATLAS was a great mount. So I don't see the CGEM as an untested mount I see it as a just an improved version of the ATLAS. Some of the improvements are the bigger dovetail, better couterweight bar, better motors, faster slewing, fantastic polar alignment routine, and better hand controller software. The CGEM can carry any of my ota's with less than 2 seconds damping time when using vibration suppression pads and that is all I need for visual use.
Plus it just looks way cooler