Not that I've had much to compare it with (i.e., I haven't used the one in Melbourne or Gold Coast - flight experience I think they are called?), it seems quite professional, based on Microsoft Flight Simulator,
Visuals go behind the windows of the flight deck, about 90% of the buttons/gauges are functional
However at the end of the day, it is home built - albeit a very good one
Depends what you are after really