I actually haven't. How's it? Wouldn't it be more expensive?
Mostly I use it at home conneccted to monitor, mouse, keyboard...soon a server.
The official dock is definitely more expensive, and judging by the other posts around here about it, you'd only get it if you really want an aesthetically matching setup. This is because the dock acts more like a port replicator than increasing port functionality and is on the expensive side for something made out of plastic. Notes here along with hub suggestions.