I handled and shot one when I worked at a gunshop in the early 90's. The experience has been pretty much already summed up here. I do remember shaking my head after firing it wondering what they were thinking when they designed it.
I'm not in to Glocks and the other assorted such handguns, but how they ever though that pistol was going to give the others a run for a share of the L/E and personal security handgun market is amazing.