See my title.. Way too expensive. You better search a little longer for alternatives. Very basic inventory ("all you need"; uhuh), internet is l-i-m-i-t-e-d, warm showering water could be gone, and they can learn a thing or two about cleaning.
Then, the heating apparatus could be above your bed on the first floor, while the too small living is downstairs. It will take up to two full hours before the living is a little warmer in winter. And -yes- by that time, the temp of your sleeping quarters will have reached 35 degrees C.
Even when something happens to your gear, due to doings or inactiveness of the landlord, and his insurance does not pay up, you get the damage.
Otherwise, the staff is very friendly and Mechelen is a very nice city.