My main setup for monitors in my home office is a top-down setup (two monitors, one on top of each other) and the dual mount doesn't work for that setup. I installed it with two 27 inch LED monitors side by side with no problem. The armrests are adjustable in height and monitor orientation (landscape or portrait) and can be offset but not stacked. I will be using this for my wife's desk as she only needs two monitors (I use 5, one in the middle and two on the sides). Overall this is a good mount and most users will find it acceptable. P-)