We are quite often in this part of Belgium and Bertem Natuur is one preferred accommodation. Linda, the host, is very helpful, very friendly and makes you feel at ease the moment you park your car in the court yard.
The hotel is easy 15 min drive from the Brussels airport, the rooms are clean and spacious and in the night it is perfectly quiet for a good night's rest. Free wifi and delicious breakfast. The only strange feature is the missing door to the bath and toilet, a bit awkward to me, but you get used to it.