Unless you have paid for the Business Plus fare, you need to OLCI - otherwise you will be charged a fee. FR is an OK airline (better seat pitch than BA on some aircraft, huh) as long as you understand and accept the limitations (e.g. 2 pieces of hand baggage per person, but only the first 80 wheeles are accepted on board, the rest are sent to the belly of the aircraft for free, this is why people queue up early).