As part of our training here in Western Australia, we had to come into Perth Airport (OK, not as busy as a European or American large airport
) to qualify us to fly in controlled airspace. This always involved a low pass (300ft pull out) rather than a touch and go. It was interesting the different perspective on that big old runway. Couple of times ended up orbitting while waiting for one of the big boys to come in.
Never had a problem with ATC, they were always friendly and keen to help. Only time I struggled was when there was an Asian trainee on and I was REALLY struggling to understand her.