The difficulty varies, just when you think it should easy, you get smoked and vice versa. Cashflow is always a problem, never having enough. Could never earn enough XP to max out anything but one or two stats; so that sucks. Price of game is down from $49 to $35 last I checked, so I think it's worth that. Do the tutorial at the beginning (tell Jack you want his help). You get a few items that would have cost you mad cash to start off and you end up getting a few XP for it immediately and then a few more later on in the game as well.
Let me know if you start playing it...
PEACE.