I flew LHR-KL in October 2012 on Malaysia. Outward on B747 - this was OK but the plane was showing its age. cabin crew, food, entertainment were great.
Return from KL-LHR on A380 - we sat upstairs as the back 3rd or so is economy. Seat configuration is 2-4-2. These are new planes so are very smart and up to date - there is plenty of leg room - I am 5 10- and the seats have good recline. seat back TV is larger than 747 and there is a huge on demand movie, tv choice - I watcheced 3 films on the way back and you can start any film, programme etc from the beginning. Again food and service were great - the back has 2 if not 3 toilets for a smallish economy cabin. Best long haul flight we have taken.
hope this helps.
Edited: 6:47 am, January 07, 2013