There is also an express bus that leaves every half-hour between the airport in Brussels and Antwerp. I forget the name of that bus, though, but the fare is reasonable and the seats are ok, though I am sure this bus is not as fast as the train, especially during rush hour. I am not sure if the bus is less expensive than the train either. Anyway, I have taken this bus and have no complaints about it, and there is room for luggage.
I am just suggesting and recommending an alternate option in case you need it.
[This message has been edited by Canarsie (edited 02-09-2003).]