I just got this monitor last week, upgrading from a 1080p 60 hz TN. It's definitely nicer looking all around, and I appreciate the improved view angle.
However, I've read some misinformed assumptions on some other forums about G-sync. Some people are under the impression that G-sync will somehow miraculously cure the look of fluctuating framerates, or in some really zany comments, improve framerates. And that is false. G-sync does not change your framerate. If your PC fluctuated between 20 and 60 fps with a game and v-sync off before, it will still do exactly that now.
G-sync gets rid of the screen tearing of v-sync off, while also avoiding the input lag/stutter of v-sync on. If you're sensitive to VISUALLY noticing framerate fluctuations like I am, you will still notice them with G-sync. The only way to get rid of fluctuations is with upgrading cpu/gpu and/or adjusting game settings.
I still notice the fps drop when I drive into a really grassy area in GTA5, but the stutter and input lag of v-sync is gone. I will say that it is still a wonderful upgrade. For years now, input lag and stutter of v-sync has been bothered me with almost every graphically demanding game. Sometimes it's enough for me to stop playing and mess with settings to get rid of it. I odn't have to do that now.
