Checking in and out was easy! The building for the apartments is located a few houses to the side of the "reception". Our room 3A had two small beds and a sofa chair, which were OK for the price. The only downside was it's a 3rd floor with not too wide stairs, so bear in mind that if you plan to take multiple suitcases. The apartment is located 10 minutes by foot from the Brussels Nord train station although walking from there at night wasn't the best decision. Seems like that part of the neighborhood was the red light district and there were a few homeless people on the way asking for $. Walking to the other side though, you have access to the city centre and there you find nightlife, bars, restaurants, and most of the touristic spots. The apartment had a kitchen stove which we didn't use and a small fridge.