I bought a new monitor for my gaming laptop (gtx 1070) after the drivers released. I went with the Gsync certified Asus VG278Q and then a month later discovered there's an IPS version (279) that's a small price difference and still freesync (not g-sync certified), but this made it sound like it works. Technically I still have a day left to return it, but I don't know if I should, with the 5% possibility that it isn't flawless. At the time I bought it there wasn't enough testing done on non-certified monitors to make an educated purchase. I still haven't seen any good comprehensive lists/testing done.
Mate, the VG278Q is literally on Nvidia's 12 monitor recommend list. It'll work fine, don't waste your money, you won't be able to tell the difference between Freesync / Gysnc compatible and Gsync.
As I said in the post, the majority of Freesync monitors work fine. The ones that don't only support Freesync over HDMI which Nvidia doesn't support but AMD does, and a couple manufacturers put out really shitty monitors that have issues, but those same monitors have issues on AMD cards as well. It's rare you'll find an issue that's Nvidia specific.
Also, there's been a ton of testing. It's literally a google search away.
https://www.reddit.com/r/nvidia/comments/ajapt4/best_freesync_and_gsync_compatible_monitors_for/
https://www.reddit.com/r/nvidia/comments/ai02vr/optimal_settings_for_gsync_on_freesync_according/
https://www.reddit.com/r/nvidia/comments/ag6a9f/how_to_enable_adaptivesync_freesync_if_you_have/