Our stay at John and Ceca's place in Brusssels was great. It was really central, we walked from the Eurostar station which took 20 minutes and only 5 minutes from the main square Grand Place and Mannequin Pis. Also only 5 minutes from nearest tram/metro station.
The apartment was as described, really clean and stocked with kitchen equipment so you could cook at home if you wanted. Nice little luxury to have the coffee machine.
We went with our 1 year old daughter and John kindly provided a travel cot and high chair, which made travelling easier as less things to bring. Apartment was spacious and enough room for her to play too.