I was a die hard F4 player in the days it was released. And I must say its the greatest combat sim ever.
Even though its four or five years old it remains te best sim out there.
A few cons though. The graphics are ofcourse a little old and i think 800x600 is the max it supports.
The sim does however support a lot of thirdware party software.
Like new panels and new sceneries. You might wanna check www.f4hq.com for more info. There are also a lot of online squadrons to join, and that still play F4 all the time.
It think its a game that will never loose its grace.
Ofcourse the choice of buying the game remains totally up to yourself.
just bear in mind that the flight dynamics and the use of weapons and other systems are just great. And really accurate. there is also a good manual written by Pete Bonnani, this man is a real F16 pilot and can tell you everything there is to know about the Block 50 F16.
Hope this helps ya out a bit.
If you have any questions please ask them.