We were picked up at the port in Zeebrugge by Limousines Van Opstal, and spent several hours in Bruges. We really didn't expect a tour there - we were meeting a friend for lunch there - but the driver felt this was his duty. So he walked around with us until lunch. Later, he drove us to the Atomium, and then into Brussells, where he again gave us a walking tour.
Finally he dropped us off at Brussells airport. So I would definitely recommend Van Opstal if you can find them. The problem is that there are hundreds of businesses in Belgium using the name Van Opstal!
the atomium