Pros: DVI, keyboard, and mouse switching works great. Price is very good for a four port DVI switch. Includes four USB cables, which is pretty generous, considering the price.

Cons: D-sub signal is very weak. When I use the switch with d-sub, the picture is extremely blurry and only works well at very low resolutions. I ended up just plugging the one computer that needed d-sub directly into the monitor and switching with the monitor controls, which works okay.

Overall Review: If you only need DVI, this switch is fantastic.