Got it and played for a few hours, did all the Saudi Arabia missions except the last one, or what seems to be the last one and I'm liking the game even more than I thought I would.
Liking almost everything about the game, the gunplay and stealth aren't bad once you realize that everything hinges on how much you upgrade your character and gear, and ends up playing pretty similar to a dumbed down version of Splinter Cell Conviction.
The enemy A.I, is really the only weak point, they tend to charge you too much once they see you and can be lured into traps easily. I've had two occasions where I was behind cover and they called for reinforcements that ended up sneaking up on me but then running directly behind me and then around the corner without even seeing me. They also don't seem to have any range on their line of sight as I've accidentally killed a few guys right in front of sentries perched above directly in what should have been their line of sight and they didn't flinch. I don't think they realize dead bodies either. I'm playing as a stealthy character using primarily the pistol and bare hands, only resorting the assault rifle when things go to shit, since it takes a day and half to kill anyone with the pistol when you don't line up and critical shot. Despite my complaints about the shooting, in the grand scheme of things that part of the game is passable just like Mass Effect 1 was.
The graphics seem fine to me, its no beauty but they don't take away from the game at all for me, there is just enough detail to keep each environment from being bland. The dialogue system is great, as I already can't wait to try another approach to things on my second playthrough, I am playing as primarily Professional on my current one. The level design is better than expected with a few alternate routes for each combat area and I like the way the hacking minigames are implemented, they aren't cakewalks like Mass Effect's.
Overall it's been pretty enjoyable so far, if you like Mass Effect and/or Splinter Cell and are on the fence I would recommend you check this out at some point, don't be completely turned away by the reviews.