Great location and good experience. We had a 'Grand Studio', which was a double bed and a double sofa bed (which was a bit noisy with the metal springs until you found your sleeping position). We had a view that meant we could see both Gare Lille Flandres and Gare Lille Europe.
It had a kitchenette and desk too and was well apportioned. The bathroom was through the bedroom (TV didn't seem to work) which had a sliding door to the lounge area (TV did work) which itself was down a corridor where the kitchenette could be found by the door with Fridge, Double Hob, Microwave. The way our room was laid out meant that the bedroom was quite far away from any other room and the walls were sufficient that there was no transfer of noise either to/from other rooms or the lift which we were directly behind (and was the reason for the corridor). There was a breakfast on offer but with Carrefour literally below us, there wasn't much need. As you would expect, you are expected to wash your dishes although slightly strangely you are also expected to throw your rubbish in the trash chute upon leaving, else you'll potentially be charged €57. Staff were all very good and there was a luggage room as check out is 11am (although their room guide says noon). Would definitely stay again, although their rack rate is an obscene €198. Very close (next door/underneath) to the Euralille shopping centre and entrance to hotel is next door along from Carrefour exit.