I have just flown LHR-DXB / DXB - LHR and found the club world dining service extremely slow, especially on the night flight out not recieving our meals until 2.5hours after take off. The veggies were massively overcooked too! I think it was more a staffing issue as the flight attendants seemed very busy and it seem's the reintroduction of this service hasn't been very well considered.