LULU hyper-market is best is you want to buy some fruits and vegetables. Meat is good as well.
I don't really trust to Carrefour as there are spoiled "fresh" chicken sometimes. The salesmen did not even care when i said once that they have a fly on a piece of fresh meat. other time on the front place was a little jar with a mold (i guess there was some fish initially)
Family Food --- not so big choice...
Giant stores -- a bit better than Family Food
....after all.... LULU is the best and the 2nd runner up is Carrefour