This game is a very good FPS with RPG elements mixed in. I like earning skill points and then spending them on different skills to enhance the game. The weapons (real heroes of an FPS) are awesome like the sniper rifle and my personal favorite the shotgun. The graphics are a little below standard but this came out when the PS2 was still fairly new and computer to console games rarely work in the graphics department. If you like FPSs or any combination of FPS and RPG then try this game out. It's difinitely fun to look for different ways to complete a mission (my opinion).
I thought the PC version of Deus Ex was pretty good, and I had hopes for this one. What I got was a weak port of a game clearly hoping to cash in on the PC version's glory with minimal effort. Let me give a brief list of complaints:
Loading times are awful.
Graphics are sub par - especially for the PS2.
Controls are a nightmare. Precise aiming is very difficult, and navigating the menus is a thorough pain in the implants
Essentially there's nothing in this game that isn't given in a superior fashion on the PC. If you absolutely love first person shooters and can deal with flaws, Deus Ex has a neat story and some cool elements of play, like lock-picking and security cracking, but if you've played the PC version skip this thing like the plague.