If your flight arrives on-time and you have 4 hours to spare, you can take the train (station inside the airport) to the Central Brussels station in around 30 minutes. From there it's about a five minute walk to the Grand Place which is a very interesting plaza with great food/people watching/ and some shops (there is a great Tintin Boutique there). I flew Virgin Express a few months ago roundtrip between BRU and SNN. It's very cheap and service was good but seating pitch and width is very poor.

[This message has been edited by Applefan (edited 11-15-2000).]