Where to start with this classic game that I used to play and love twelve years ago...
This is the game that got so many people hooked on tactical shooters and the Rainbow Six franchise, yes it is dated, yes it can be frustratingly hard (if you rush eyes closed and play it Rambo-style, you're dead meat for sure) and it requires patience.
If that is too much for you, don't waste your time or your money on this, you'll be better off with the latest installments.
If not and you want to spend some quality time with a gem of a game, buy this game, plan your attack, gear up your team members and go kill some tangos and escort the precious cargo!