2D. If he is in the 2D mode, there is nothing to complain about, you do not do it to a slightly verwaschenens 2D image which is not so good. Furthermore, should the 3D Color Boost disable a reach "normal" view. Adjusted correctly, there is nothing to complain about.
3D. For this he was purchased. The source is an Xbox 360 via HDMI. Nice is that you can tap on the monitor the sound of the HDMI input via headphones directly. 3D enabled games are Crysis2, Battle Los Angeles, and Sonic Generations. Crysis was developed for the 3D representation, it shows and it works great. The image has a tremendous depth and looks great. For technical reasons, fall for each eye ungefär from half the resolution. So you noted compared to Full-HD 2D representation that the resolution no longer is so fine. If one accepts this, one has a unique 3D gaming experience and finds 2D games then less enthralling: D.
The image is sufficiently bright and contrasty, the glasses are light (Mostly probably work the polarized glasses from the cinema) and the monitor is for 1-2 persons in 50cm distance also big enough for the 3D experience.
A software is included for Windows PC, a sort of media center in 3D. Thus, 3D videos, 2DVideos, DVDs, photos and games can play in 3D. The play of 2D material in 3D works surprisingly well. Two and a Half Men in 3D is even funnier: D.
Overall, the 3D mode is worth the small fee to a 2D 23 "monitor. You get a very solid 2D monitor with good 3D capability + cheap glasses.