Deus-Ex is like good old wine, it gets better as time goes by...
Deus-Ex is a game for a very specific kind of players. It cyber-punk environment and the rich history that engulfs the player is like living in a "Miami-vice" in the future, but so much more cool! The way you can decide to play this game makes it a very unique experience. From time to time I fire it up in my computer and brings back great memories, even better than my crazy shooting spree with Half-life, but that is just me.
If you have not play this game yet, do your self a favor, get the new one that is coming out in a couple of days, play through it and then play this one, it will be a very rewarding experience, and if you have time, read the novel too, it was a nice addition to the history...
Quo est veritas? It is for you to decide...
Enjoy it!