The food is the same as in any McDonald's. But the store was sort of deserted (on the staffing) and with many orders, it took quite a while to be served. There's a reason why stores like these are called "fast food chains" - the expectations are different from the wait times that are acceptable in a restaurant. Otherwise, staff was polite (in spite of the workload) and everything else was OK as you would expect.
While passing through Marseille, I had lunch at this McDonald's. The interior is very large and spacious. Very pleasantly surprised by the ultra-fast table service. The menu was well prepared. Hot fries and hearty burger. Really great new dishes.