I went to BigC Rama 4 after the change over from Carrefour, and there is some good news
there is a lot more products from France, and better ones. The Saucisson for example is of much better quality for the same price as it was from Carrefour generic brand, and there are a lot of choice for cheese and all kind of French branded products. Overall I said the overall quality of choice has dramatically increased, for the same price as it was previously. Much better than Carrefour. You can even find caviar and good foie gras.
only one problem, it's BigC so it's very noisy with loud speakers etc... the usual supermarket non-sense here, so it's best to shop quickly before you forgot why you went there in the first place.
even the bread is perfectly acceptable, same as before so things didn't do too bad after all