Returned to LHR today on a MAS 380, and, as with the outbound leg, the service was fine, food OK, and the seats more comfortable than those on BA's 777. (I can only speak for economy unfortunately )
The upper deck economy cabin was especially comfortable, and you did not feel that you were flying with hundreds of other pax. Having said that, both our outbound and inbound flights were only around 50% full, and less than that in business.
It was also disappointing to note that the toilet that was out of service on our outbound flight was still nonfunctional over 2 weeks later,