We just took a trip from Chicago to Cancun roundtrip. The United crew both ways were very nice and accommodating. We ungraded both legs of the flight to Economy Plus at a cost of $39 per. It was definitely worth it for a longer flight. We were in the front of economy both ways so tons of legroom. The only drawback; those seats don't have armrests that raise so it's a bit snug. Seems like airlines and flights can be hit or miss lately. This was one of the good ones.