We stayed for 3 nights and had a great time! Convinient location with walking distance to many attractions, cafes, shops etc. Bus stop in front of the door if needed. Room was spacious, clean and doesnt have that commercial feel like you usualy get. Simple retro decor, wooden floors, tall windows, very comfy bed. Overall ambiance is very cozy and French. Free wi-fi with good speed and very cute breakfast, simple but nice (fresh sqz OJ, eggs, cheese, fresh bread, croissants, cereal and milk, yogurt). Staff were very friendly and helpful, even gave us a free crib for our baby and highchair during breakfast. Coffee machine in the room was a nice touch as well.
The drawbacks: it is a very old building therefore no A/C and no elevators. (we were lucky with the weather so opening the huge windows was good enough). There is no fridge in the room. (we were allowed to store baby formula in the main fridge, but fyi) There is no CLOCK! :) no big deal but we came from different time zone and had to google it every time.
Overall this was a great find in Lille! will recommend to everyone and will come back if there!