Ignore the two-star label and stay at Hotel Brueghel, a lovely individual guesthouse in Lille. It's very affordable, and handy for Eurostar - just drag your bags 250 metres down the road.
If you choose a twin room you'll tend to get more space - you can always push the beds together if you're a couple. Tasteful furniture, seagrass carpeting, white walls, great original lift.
Don’t bother with breakfast, though - go to Paul in the main square and get the works: pain au chocolat, fresh orange, bread, confiture, coffee/tea/chocolate - for a handful of euros. It's a beautiful start to the day.
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