Given the amount of cancellations and schedule changes with the airlines, I'm not sure there are any Pro's. Numerous carriers will NOT allow seat selection until final payment which is an instant NO to me. In booking my own flights over the last year, any time a major change happens, I can select any flight and seat (same class of service) for no additional cost. Even when I forgot to acknowledge a change, the airline worked with me and allowed me to change to a far more expensive flight for no charge. Hold and wait times for customer service suck on both sides so that is a wash. With FBC, they will chose the new flights and you may not get the best crack at seat selection. Unless you need an overpriced transfer included, I'm not why anyone would use FBC in this current environment.