I am not sure what you mean exactly with quality, but if you meant the image quality on the other 2 monitors, then there is no noticable difference. I've done a lot of research before I bought those external graphic cards and they are really the best on the market. They work so seemless that you can even run a video and stretch it over all three monitors and you won't see any lag. If you meant the laptop, all I can say, is this is the first laptop that I am fully satisfied with (which is a really hard thing to do), but I would recommend also purchasing
this device for 4 extra USB 2.0 ports since it has only 2 build-in if you use it as your main workstation.