What little I have used my GEE, I have liked it. It does seem to eliminate DOMS if used before and after a WO. Since I only have the capsules I'm not willing to try to mega dose them but I think GEE in the 10+ gram per day range might be pretty cool.
MGG sound really nice. I'm a big fan of magnesium supplementation anyways and lately, I've discovered the joys of taking an Epsom salt (which magnesium sulphate) bath after leg day once a week or so. Really helps with recovery and makes me sleep like a baby.