Cheers for the replies guys, i got silver during my transit through Houston, i was thinking of using my RU at the last minute but then decided not to as i had an unofficial skycouch (as only person in the row) but then just after i boarded two people came and sat beside me, must of been a late change by the airport so i ran up to the CSM and asked if i could use my upgrade and he went off the aircraft to get it sorted but i was 10 minutes too late as they had closed off the flight. It was a bummer until a steward came to me before take off and said they had another row (skycouch) reserved for me after takeoff. Was excellent service i thought.