I'm still waiting for the parts for the upgrade as others are to , just read the Gsync thread make your own conclusion, fill out the forum on the first post first page of Gsync thread by Bahz at the bottom VIP link , u can always change your mind
https://rog.asus.com/forum/showthread.php?82612-G-SYNC-Upgrade-on-ROG-G751JY-JT-Laptops-Now-Availabl...!
and 100 bucks is cheap u may even get a new Motherboard and processor "UPDATE 4 (Mar 11, 2016)
I've been updated that we'll be extending the deadline of this program to July 31st, 2016" Quote Bahz
So u had better act soon to get on the upgrade list. Ill get the Upgrade its worth it in long run in my humble opinion