Staying with Lies and her family was a great decision. Lies and Sulaiman are very welcoming hosts, friendly, interested and open minded. They leave you all your privacy but a great conversationalists, too.
Their place is a pretty mixture of good taste furniture, art and family feeling, which make you feel at home quickly. In summer, the small courtyard/garden must be wonderful!
The flat was located perfectly to me, close to the European quarter, shops, supermarkets and bars. Ixelles has a lot to offer and only waits to be explored. For reaching the rest of the city, you can either walk or take public transportation just from right beside. If you look for something nice to do, they won't hesitate to help you out with some ideas and knowledge about Brussels.
As this is a family house, you should keep in mind that the familiy has their fixed daily procedures which should be respected. In the morning, agreements for the bathroom timetable are therefore necessary. Anyways, this didn't limit my good experience. I had a very pleasant time in this cosy family house and can recommend it very much.