I have the Bianchi from Jenson. The only thing I had to do was straighten the handle bars and install the the wheels and pedals. I believe the brakes and derailleurs were already setup, but that is something you should learn how to do if you don't already know. Cranks, BB, levers, etc, were all good.

Jenson was great to deal with, by the way. Fast and reasonable shipping to Canada. The bike actually came with the wrong length cranks, so I phoned them up and they were very apologetic. They said if they couldn't get the proper cranks from Bianchi they would substitute some nicer Suginos that they had. The guy even called me at home to keep me updated on the issue!