I got it and spent about 6 hours with it last night, off and on. The game mechanics are pretty repetitive, but the main focus of the game is the cinematics which I love. If you can see past the repetitive nature of much of the chase scenes and remember that this is a cinematic-based game, I think you'll love it. Graphically, the wide cinematic shots leave a little to be desired as I noticed some tearing in certain instances but that could be the tv/xbox and it doesn't detract from the game imo.
The facial expressions of the characters are what stand out most for me. They obviously went to a great deal of effort to convey facial expressions of emotions correctly and the faces of characters tend to be similar to the individuals who voiced them. I won't spoil by droping any names but I saw/heard quite a few I recognize.
One thing I will mention as a pro and con is that causing chaos and damaging property like in GTA is frowned upon in this game. I was not very surprised by this but it doesn't seem to impact gameplay too negatively. Though I'm curious to see if that has an impact later in the game. One cool feature is that while you're working on the case, perhaps traveling to question someone or investigate a scene, crimes will go down and may happen right in front of you. I wonder sometimes how often that happens to police irl.
You begin the game with no real idea who your character is, and I found it hard to identify with him at first, but they reveal more through flashback cutscenes as the main story progresses and that's the part I like best.
All said, it's kind of refreshing to be on the other side of the law in a Rockstar game. Now I need to find a way to get out of work early and get back to it...