The room was excellent. I had access to my own balcony and my own bathroom, which was very nice. The room was very clean and the bed comfortable. I arrived later than expected because my flight was delayed, and Aerlin was able to rearrange the arrival and we were in continuous contact. I gave it 4 stars out of 5 because the toilet and the kitchen needed some cleaning. In the toilet you could see stuff left behind by the previous guests and the shower and wc needed some scrubbing. As for the kitchen, I shared it with Aerlin's flatmate, and although it had all the utensils necessary and even oil and spices for you to use, the flatmate was kinda messy, leaving plates on the drying rack where I could not leave those that I cleaned and the trash wasn't taken out for days. The stay was very nice, and I recommend staying at Aerlin, as even these small details are small and would not make your visit to Brussels a disaster.