Mariano's apartment was very clean, tidy and modern, and was perfect for the short time we stayed there. The bed was incredibly comfy, and waffles were left for us which was awesome. The bathroom and kitchen were both great, and a couple of things were left in the cupboard for us. The location was a little out of the way, but with some sights within walking distance, and the metro was only a few minutes walk away.
Communication before our arrival was good, however we had a few complications accepting dates on Airbnb as they needing changing (which wasn't Mariano's fault, it was the website), however Mariano allowed us to arrive on the new dates anyway which was good of him.
During our stay communication was a little poor, as Mariano had informed us he was on holiday and didn't want any further complications. When we arrived, his friend Fabio showed us round and was very helpful.
Despite some communication errors, we had a really nice stay in Brussels and the apartment was lovely!