Ew.. don't get one of those.. they are manual switches.. they make auto switches that are much higher quality.
My manual switch was also just like this and after a while it broke.. also had some issues, like screen ghosting (use VGA cables with ferrite rings or you'll still have that issue), color issues, and occasional lock-ups. The auto switch still works great, supports plug 'n play (mine has keyboard/mouse, too, though), and can be reset in the rare instance when it locks up.
Go to pricewatch.com and look up "auto KVM switch," then go to one of the retailer's pages and find one with just VGA inputs. You'll be glad you spent the extra few bucks.
Got a call as I was typing

.. but wanted to mention, the ones with keyboard inputs also support hotkeys for switching input, which can be useful.