Bad experience, first we were in Brussels for the annual new year fireworks. As being an elderly couple, we did not intend to see the fireworks outside, this is the reason why we have choosen the Thon because of the tallness of the hotel. When we checked in we asked for a room from where we will see the spectacle, the person said that he was booking us in room 2405 where we would have one of the best possible view. At midnight on New Year's Eve, we realized that we were totally at the opposite side and could see nothing.
Secondly, the room air comfort was not acceptabe, it was too warm and the window could not be opened, and the conditioner could not refresh. And the cleanliness was not that great.
Overall, the worst place we stayed in our 12-day stay in Belgium.