Got the lower end model of this myself, the G2490FQ, and it's alright. The colours are decent and it works fine.

The only problem I've really had is that it only works in 144hz on displayport, not over DVI Dual Link. Not sure how common of a problem it is, could just be a one-off problem with this unit.

I'd recommend it, but with the smaller difference in price with other 144hz screens in the US than in the UK (This monitor cost me about £180, the Asus VG248QE is about £250), you might be better off spending a little more to get the option of stuff like lightboost.