Unfortunately, there's one aspect of the game that Gaming Nexus suspect is also true to real life: once you get the hang of doing it right, there's not much left to challenge you and keep it interesting. While it is the type of game that can be picked up and learned quite easily, it is equally easy to drop once you've mastered it.
Keep in mind that this is an observation from a guy that has to drive way too much in the real world, though. Part of the appeal of computer-based simulators is that they allow you to experience things that you probably can't do in real life. While driving a bus around town doesn't seem that exotic and attractive to Gaming Nexus, they can easily see how it would appeal to the younger set.