Flight Simulator X is arguably the best jet sim the world has ever seen.
First of all, I am displeasured with the system requirements of the game, the huge files needed for the installation(15 GB), and the lower performance in WinXP.
But apart from all these, the game is great.
The realism of the game touches perfection, especially when you have a brand-new graphics card and turned into high resolution.
Controlling your plane is not that easy. Actually, it turns out to be more challenging than real life, sometimes. The controls of the keyboard are not to be familiarized with, so you'd better go and buy a joystick(which works perfectly well).
In the menu, there are many tutorials which will learn you how to fly easier, and a great variety of missions, which are supported with a briefring and a helpful map.
There are missions for every kind of player, from a newbie to FS fanatic, but all of them finally reward you with a medal or trophie, if you succeed.
As I said before, the visuals are stunning, but only in condition you do have a respectable GPU. The sounds of the game are good as well, so realistic I can say. For example, the sound you'l hear outside of your jet and when in the panel differs.
Flight Simulator X is another amazing game of the series, with Microsoft proving their pedigree once again. I hope the next sequel(and I am sure that I will be right) will break every past record.