Transferred landside between terminals twice in the past two weeks and was not as bad as expected. First time was from T1-T3, and in reverse for the second. Terminal transfer bus stops are well signed within the terminals, the schedule says one bus per hour, not sure if it was just luck but both times there was a bus waiting as we arrived at the transfer desk, so barely had to wait. From T1-T3 the bus stopped at T2 in the middle, first at departures then looped around again to arrivals, whole trip took around 40 minutes at 7pm although a lot of that was boarding/alighting passengers and luggage (lots of luggage). Coming back from T3 the bus went airside most of the way to T2 then landside only stopping at arrivals then on to T1, whole trip took no more than 20 mins at 4pm.