I loved Hitman 2. Top 5 on the PS2 IMO though so i'm very biased. Not played it in a while (don't own a copy) so I cant remmember everything, but i'll try to give a few lo's.
1. A friend of mine found it got too hard pretty early on. He gave up after about the 3rd mission. But...
2. ... on the flip side of the coin I found it a bit too easy, so go figure.
3. Movement wise you could argue it's not the most fluid game, . I found it's nowhere near as bad as when i first played Tomb Raider. It can take some getting used for newcomers but once you get used to it (like Tomb Raider) it's fine.
I'm sure there are many who would argue there are many other problems but as I said i'm biased. Love the freedom, eventually loved the controls (after configuration) and despite it being easy, I found it very replayable (wepons to unlock, diferent ways to kill a target e.c.t.)
Only played the PS2 version of Hitman 2 but i'm buying Contracts for the x-box for graphical and hard drive reasons.
Before you consider buying Hitman: Contracts though grab a copy of Hitman 2 on the cheap. Play.com have it for £9.99 (on the PS2) and Virgin Megastores Online have it for £11.99 (on X-Box). Best advice I could give is to snap one of these up. With any luck by the time your finnished with it Contracts may be due for a price drop
p.s.
I would have posted the links but i'm a newbie and haven't figured them out yet