I was impressed during my first visit this week. T3 is huge and as other comments suggest you have to be prepared to walk a fair bit although their are numerous moving walkways and you can ask for a buggy. That said the terminal is spacious and toilets are spotless and some even overlook the apron and one of the runways. Transit was quick and painless and when I returned for an overnight stop my bag was on the carousel 15 minutes after landing. The Immigration staff were the friendliest I've encountered in a long while all smiles and welcomes which makes a nice change! On my return I was out of my hotel room and checked in within 15 minutes. I may have travelled at quiet periods of the day for this terminal but that does not detract from the all round quality. A very relaxing experience all round.