There is no question....the S UA F class seat! It Comfortable and you don't have the chance of having to climb over someone or having another person climbing over you! The PMCO 777 in Business is cramped and outdated for the 2010s. F class is the. Way to go for comfort! Hopefully we will see the new United update the PMCO two class 777s to bring the more inline with the seat comfort found on PMUA!