Definitely doesn't live up to the graphics shown at E3, the gameplay is a bit more serious than other free-world roamers like GTA and Saints Row. Overall the only redeeming thing is the hacking part and a few features of the multiplayer, otherwise you should just get GTA 5 or Sleeping Dogs instead.
From the footage I have seen, the surveillance aspect of the game definitely sets it apart from its peers. However it still feels like a game where you would rather just break into the nearest car and start running everyone over lol.