This is one of the games where I wish it was reviewed on this site before the star rating system was added. I'm playing it on pc, hard mode, and besides the occasional texture pop-in, and a few furious first attempts at the hacking, I'm enjoying it immensely.
If the person doesn't care too much about the graphics, and likes RPG's, I think this one is a possible keeper. Maybe it was the way it was advertised, but there are a lot of folks (not here) complaining about shooting a guy straight in the face and the character missing. The thing is, this game is an RPG in a spy world; it's not a shooter with (a lot) of RPG elements like Mass Effect. It's just an RPG where you get to shoot, and the mathematical mechanics are there as underlying rules.
I remember when I first picked up KOTOR, the first thing I did in Taris was entering a duel with some guy. I stood 5 m from him, shooting and missing, while the poor bastard shot and missed me, for a good 3 minutes, until the pc was so bored it killed that enemy just so I could move on with my life.
And it's not a stealthy game. It's an RPG where you can hit H and Hide in Plain Sight, causing criticals (thankfully there are no undead in this game). And sure the AI is just a wee bit... "special", but again, in hard mode, it's not overly ridiculous. Just has its quirks.
Someone in the official forums claimed that this game could potentially be the next Vampire The Masquerade Bloodlines, and I couldn't agree more. A fairly deeply flawed gem (VTMB was downright unplayable for me, which gets even less points), but one I'm sure I shall remember fondly and come back for it a great deal of times.... especially if some fans deliver a wonderful goody-patch like it happened for VTMB and KOTOR II.