I have only played through this game once as I write this but I must admit I am actually quite impressed by it. There are lots of good points about this game including:
A good involving and realistic storyline.
Interesting and varied characters.
A Good interaction system with the characters in an impressively worked modern setting.
The stealth option is entertaining, especially if you like to be patient e.g. tenchu style.
You have the option to go all guns blazing if you are impatient.
Good variety of customisation options for character and skills development, weapons and modifications and armour and modifications.
There are a few bad points however:
The aiming and Shooting with the guns is terrible, even when levelled up in a particular type of weapon.
The damage with the weapons is also a bit stupid, e.g. it might take 5 point-blank shotgun blasts to kill a random enemy but if you let a critical shot build you will knock him over (Doing very little damage) but then you can stomp him for an instant kill.
Headshots are the only way to easily deal with your opponents if you have been seen and are in a shootout.
Top tip is to develop your assault rifle skills, will help to see you through any combat, especially since some is unavoidable.
I enjoyed this game despite its flaws with the combat and the option to be stealthy adds a nice bit of difference for some of the missions, allowing you to customise your characters equipment and weapons before a mission depending on the style of play you would like to use.
This game is definitely worth picking up, especially as it is in the play sale as I write this review. I am sure that if there is a sequel on the cards they will improve the areas of the game which are lacking but this is a great start and could turn into a good franchise or series of games.