I like the added realism provided by World Traffic 3.5 but it does have some interesting quirks. I notice one of your photographs shows Korean Air in mirror image; I find the occasional Qantas aircraft with the same look. I also see aircraft disappear down the tunnel when using taxiway C at YSSY instead of remaining on the 'flyover' part. They do reappear on the other side!
ATC is also interesting with a lot of departure and arrival commands asking for heading changes of 2, 3 or 4 degrees and flight level changes to unusual levels.
When flying out of a busy airport I turn down the saturation level. My first flight out of Heathrow using World Traffic was a lesson in itself. With 70% traffic volume dialed in there was still more than a dozen aircraft ahead of me waiting for take off clearance. I noted that if I clicked 'enter' to notify Tower I was ready for departure I was given immediate clearance and told to taxi into position. That meant sliding through all the other aircraft in the queue which sort of destroyed the realism.
None of this is a complaint but merely observations from my first week of using it. World Traffic is well worth the money and as an example, anyone concerned about coping with a VATSIM flight World Traffic will find it useful in building confidence. It adds to the workload and if you follow the ATC calls it will certainly test your ability to manage the systems of your chosen aircraft. Add your own response to the ATC call and I believe you have a worthwhile learning tool.
A comprehensive and very useful review, Stephen. Thank you.
Paul