I have this monitor. Default gamma is very washed out and requires calibration through software, there is no hardware adjustment for gamma in the OSD. Also, there is a problem with banding in certain scenes. Blacks can look a bit grey even after calibration due to the TN panel and while viewing angles are good for a TN they are poor compared to an IPS, with heavy gamma shift. Image quality is objectively worse than my Eizo EV2436W 1920x1200 IPS monitor that I bought for £300 in 2013. However, it can look reasonably close after calibration and profiling, colours look very close just blacks are a little disappointing. Just remember that a significant number of games ignore your colour profile, particularly in full screen.
For gaming it's really good though with fast response times, 144 Hz, 2560x1440 looks much crisper and an ultra low motion blur mode (cannot be used with Gsync) and Gsync is really good. If you are not doing much gaming or don't have Nvidia then there are much better screens for your money in terms of image quality with VA and IPS panels.