The rooms are very chic and trendy..the TV even has a USB port!
Apart from that here's why we loved it
cosy Warm room
hot water
tea/coffee making facility
5 min walk to the metro
friendly reception

Couldnt find a fault!

I stayed here for 6 nights on 2 occasions in Jan 2013 while on business. Its very conveniently located near the EU Institutions. The rooms are nicely presented with a useful work-space and free wifi. Bed was comfortable and spacious. Tea 'n' coffee facilities are provided in the rooms which have an iron and board. My room at the rear was very quiet.
The TV service was a bit patchy, switching itself off every now and then. The breakfast is just about adequate and is eaten in the large foyer area. The foyer area deserves some mention; it contains a bar, table football and pool table plus a large screen for playing Wii games - a bit like a youth club.
Aloft does not have a traditional room service. Sandwiches and the like are available for purchase in the foyer area at night. The self service check-out works very well.

Stayed here from the 30th Dec- 1st Jan, it is a bit outside the city but the metro is close by and very frequent, my room was spacious, immaculate and the bed was very comfortable and quiet. I never heard a sound from any other guests and the hotel was fully booked, All staff that I met were very friendly and helpful. Highly recommend this hotel.

The Aloft has a designer feel about it, the rooms are nicely decorated and spacious and quiet, which is great. They also offer great rates and are good value for money if you get one of the off-peak rates. The location is ok as well, very close to the European Government center and within walking distance of the city center with the more touristy sights, but still easily reachable from the Motorway (E40).
The only issues we had were that there was a bit too much design going on and not enough practicality as the shower flooded almost bathroom and room and to fiddle the room card into the tiny slot to get the light working is not so easily done in the dark...
Breakfast options are quite limited and offered in a rather cool and uninviting self-service atmosphere.
Internet connection is fast and easy.