I took basically the same flights to Belgium that I took for my October 2008 trip. The only downside of those flights is the long layover in Chicago going there and coming back. All told, I spent about 12 hours milling around O'Hare International Airport for this trip.
The flight to Belgium wasn't too bad. It was very crowded, but I had an aisle seat, so I could get up and walk around easily. I sat next a man from near Antwerp, Belgium. We talked quite a bit. He was a really good guy.
I didn't sleep very much during the flight, unfortunately, which made my Friday in Belgium a bit of a struggle.