A fully loaded MWG 90 Rounder is quite heavy. Also, all the weight is off center. It rests in the crook of your left arm, but is still very awkward.
The MWG functions just fine, but hangs farther down than the Beta C.
I had one, and though function was just fine, I traded it, and the pouch, loading tool, etc, back before the ban for a HUGE pile of new USGI's.