Limited but still fun.
Textures are kind of flat and colors somewhat limited but the graphics are reasonable and do not detract from the overall game. The venues for combat and atmosphere make the game. It was fun to storm the White House. Fighting in New York and London was enjoyable. I thought the weapons were good looking and were reasonable approximations of weapons that would have been available in the games time frame.
The activation of items (doors etc) was mildly to moderately frustrating but you get used to it as the game goes on. As to frame rate slowdowns I did not experience much of that there were some slow loading times.
I found the game to be pretty easy on the normal setting. It moved fast and was not very long which is OK . Overall the game is fun as a basic shooter and you don't find yourself investing a great amount of time in it. I only paid 10.00 USD so I may have felt that the game was too short if I had paid full retail.
In summary the game is fun. Its setting and atmosphere are the best part. It is worth playing the game through as a discounted game or used game and it won't take long to do so.