So I got this for $225 + tax + s/h from the SPRUNG25 deal. AMA I guess. But here's a quick rundown.
Mounted on an Ergotech 320 Dual Arm as the primary monitor with a QNIX QX2710 @96hz on the side. Powered by a GTX 980 4GB.
144hz is smooth as expected. Apparently there's more motion blur than normal for a TN panel, but it hasn't really affected me when playing games.
Stand is flimsy - flimsier than the korean 1440p monitors. The screws thread into plastic, and the stand just tilts up and down. The VESA mount is shallow similar to the QNIX I have, so I just loaded up half of the mounting screw with washers and screwed it in. My QX2710 has been mounted like this for 2 years with no issues, so I don't expect to have any issues with this Monoprice monitor.
For a TN panel, the colors are pretty good. There's a noticeable difference in colors between the IPS QX2710 and the TN Monoprice. However, I'm pretty satisfied with it and I think that having them side-by-side is still quite feasible.
The menu buttons are pretty small and hard to click, but they work well enough. It does get a bit annoying whenever you go fullscreen at a different resolution since the monitor will display the current display information in a box in the middle of the screen for about 5-10s, so make sure to run your games in windowed borderless if you can.
Power supply was surprisingly decent. A FSP unit with UL listing instead of a cheap chinese fire hazard that I was expecting.
Haven't tested picture in picture, but input switching is simple enough. I connected my XPS 13 to the hdmi input and could easily switch between the inputs with the monitor controls.