Yes, I quite enjoyed it, certain things were very well done and fun.
(I've got the PC version btw)
A few frustrations I had were that all the venues were so similar, and while the action was great fun, it also got quite repetitive. A few more different missions would have been great.
Have you seen the Wii, XBOX 360 and PS3 versions? Especially the 360 and Wii seem to have good extra content, missions, and the ability to call in reinforcements. Apparently the skills upgrades are more useful and you can try to take different paths through the game - for example be more of a thug-type character, or more of a diplomat, like Tom.
I'll definitely pick up a copy of that when I get my next-gen system. Especially, the Wii looks like fun with the different control system!