Jennifer's apartment was really nice. It was very close to the metro and easy to find as long as you followed the house numbers. They were nice enough to let us bring our things a little early so we could make it to our tour. It was about a 20 minute walk to Grand Place which was doable.
The stairs are a bit narrow so you have to be careful with luggage (the two of us had to hand it up the last set of steps but we're also both taller). Otherwise the apartment was very nice and updated. It was really clean and felt roomy despite it being smaller. The windows let in a nice amount of light.
Due to our tour the first day and an early morning flight we didn't get to meet Jennifer. I believe it was her mother that let us in when we arrived (very nice). We had a great time, and if/when we're back in Brussels we'd love to stay here again.