On my one and only request to KLM to upgrade CO flight, it was done though it was EXTREMELY ineptly handled by both CO & KLM. Although KLM told me that I had been successfiul weeks before departure, Co kept saying it hadn't happenmed, and wasn't possible...

Essentially KLM screwwd up by creating a 2nd COMPLETELY seperate reservation for my upgrade that I spent hours getting integrated into the existing reservation.

However I was in that nice C class seat on a EWR-LGW flight.

BTW I was considerably more impressed with the beds on KQ