So Cgear if basically 2 layers of shade cloth with a fancy weave? or am I missing something?
Well, in the same sense that that a tyre is just a rubber thong made round with a fancy steel bit in it.
I'm not sure whether the stuff is a type of shade cloth or it was woven special for this application but I have tried two layers of regular shade cloth in the kids sandpit as an experiment (this was 10 years ago). For whatever reason the CGear mat lets the sand fall through but it wont come back up no matter how you squish it into the sand. the two layers of shade cloth didn't fair so well.
Add to that the tough way it's sewn together with the D eyes and double stitching and it's a pretty good bit of shade cloth with a fancy weave.
I hate spending money (in fact, refuse) on over hyped rubbish and blinged up glamping accessories but I'd buy another CGear if was in need of another ground sheet.