I own a gsync modded Asus vg248qe, and yes, gsync is something I'll never be able to game without again.
Check this forum out:
http://forums.blurbusters.com/viewforum.php?f=5
Some rather discouraging info about the ROG in the related threads, btw
how so?? elaborate??
sorry, was feeling lazy heh. Apparently the monitor has some issues with graphical artifacts. Sorry, but I'm not quite up for sifting through the threads, but if you're thinking of buying one I think you certainly should.
If you're asking about why I can't go without gsync anymore, the lack of microstutter is the big win, tearing never bothered me too much (certainly nice not to have though!).
The input lag issue happens with any and all games when fps meets or exceeds 144, sadly. I cap mine at 134 in TF2(double the game's tick rate) and don't really perceive the loss of refreshes, so no biggie.
ULMB is awesome, too. Way better than current Lightboost options; more blur reduction and much less washed out and dark. But I play games with fluctuating FPS so I go with gsync....quite a shame that it's one or the other
Would I prefer having gsync to having "more screen real estate"? Yes. A higher FOV would be nice for TF2 and similar shooters (what I have a fancy monitor for), but ultimately aim is more important and no microstutter/tearing helps that out nicely--plus it's just really pleasant to experience such smoothness.
If you're just a casual gamer though, play games that aren't motion-intensive, or not really a gamer at all, gsync is not the option for you.