The example picture makes no sense at all, I have 2560x1440 and cannot comfortably use 6 windows. I never heard of that company too. For me, 300USD is by far not enough if you need one that's really good.
We have this, and have a review coming up because many, many people have asked for it. It's an interesting monitor. You can do two windows side by side, realistically. Windows key + left and windows key + right work pretty well. We like 2560x1440 better BUT for gaming, and wide screen, it has been a better experience than expected. Could actually work well. Don't want to spoil it, but we have an upcoming video on this.