It is the best non military first person shooter that I have ever played
Pros-
#1.Excellent Graphics
#2.Good sounds
#3.Many weapons to choose from
#4.Many characters to choose from with different sizes and speeds
#5.Many cool maps
#6.You can even change the characters hats
Cons-
#1.The worst thing about this game is that it has no story.I have a friend that would rate a game a 5 or 6 if it has no story regardless of how good the gameplay is.It doesn't bother me that much but it is a con of the game.
#2.If you are a noob then it may seem quite hard at first.The spy character is really hard for some people to learn.Just copy what the good players are doing and you will get the hang of it.
The Bottom Line -
Team Fortress 2 is a awesome shooter.It is a must buy if you like shooters.All the other good shooters out there and many of them don't have the options of this one.If you can get over the lack of a story and that it is a non military shooter then buy it.
It is $19.99 on steam full price as of today.It is well worth that price in my opinion but you can always wait for a steam deal and get it cheaper.
My 2 cents
Dan