it ain't perfect
I just wanted to post a minor defense of the Bookendz docks. First off, as far as I can tell, they're the only option if you want a docking station, since Apple apparently refuses to make on.
Second, the one I have (for an early 2008 model 15" MacBook Pro) actually works quite well. It is very solid and hasn't caused any damage to my MacBook in over a year and a half of daily use.
That said, you do need to follow the directions that come with it. First off, it requires a period of break-in where the connecters adjust to the exact placement of the ports on your MacBook.
Also, I noticed that someone earlier complained about the amount of force the lever applies. It clearly states in the instructions that the lever is NEVER supposed to be used to attach the dock. It is only for detaching it. To attach you have to push it together by hand. Yes, this is janky, but it does ensure you don't apply too much force and damage anything.
Anyway, it certainly isn't as good as using a single-connector dock, but it does work and saves time and cable tangles.