Cons: The original flight was cancelled (UA927). No notification until arriving at the Frankfurt airport. 2 counters open for United, with 2 employees and 250 people waiting to see what is going on. Very little clarity or clear communication. Not to mention the members working the counter were incredibly rude and not very accommodating. Very unpleasant experience taking an entire weekend to return to SF and the repercussions of missing a wedding Sunday due to an added 24 hours of travel time.