I have looked at them, but most reviews bascially say they are nothing but cable tidys, and most of the cables u need are not supplied..... but they do look good![/QUOTE]
I had one and really enjoyed it, and if you already used an external monitor you should have most of the cables you need, you would just need a keyboard and mouse in addition to the monitor to run the macbook in clamshell mode.
In the case of a Mac, pretty much yes. On the other hand I have a Dell that has a port replicator/dock that greatly expands on the available ports and functionality of the machine. But it also has a connector on the underside dedicated to that purpose that is the interface to the dock. Something our Mac's don't have. .