Expect a great story with an interesting interactivity.
After playing for a while I noticed the dialogues were extremely well written, very direct with a bit of humor. And the story was amazingly surprising for it's originality wich tells the story of John (your client who wants a new memory) backwards. So when proceeding through the game, I was actually going back in john's memory. That kept me glued to PC while I focused unraveling the mysteries of John's life.
Another great thing was soundtrack. It adds to the game the happy/sad/frightening sensation its present in the moment. I used to play the piano so I can't be completely impartial, but the songs were great.
This game offers a decent amount of interactivity and a great storytelling. I haven't felt "touched" by a game for a long time. And I'm a player that enjoys FPS, strategy, etc. I didn't think a good story would impress me so much in a game.