I've been looking at the Mesa and the GG@G. I like the slant/cant of the GGG but not sure I care for how it is installed. Mesa looks more finished on the left side. GGG just has the end of the screws showing and even thought the GGG can be loctited, just seems to me that Mesas has a better set up. I sure like the cant of GGG though.
Any thoughts on this difference from anyone?????

I haven't tried the GG&G but i have used the mesa and Vang Comp Systems side saddles and love the velcro design of the vang comp one. The Mesa one is nice but it just didnt fit my needs. I did get to see GG&G's at SHOT this year and though it looked good. If I had to pick between GG&G and Mesa I would go with GG&G. Hope this helped.

https://vangcomp.com//gun_accessories.html