Got this game a couple days ago. Currently on the Homicide desk. Obviously I knew of it, and that it was a detective game, but beyond that it was more-or-less an impulse buy.
I was totally unaware of retailer-specific bonuses. I randomly walked into HMV, and walked out with L.A. Noire for PS3. Got it home, opened it up and found one of those scratch cards with a code for the Chicago Piano.
Thus far it has proved to be of minimal use. For one, the gunplay up to now hasn't been particularly difficult. You can win with relative ease just using the pistol.
Bearing in mind you cannot draw any weapon until the situation requires (i.e. you're being shot at), retrieving the Chicago Piano from the trunk of your car usually means putting yourself right in the line of fire.
There's even been an instance where Cole and his fat partner in the Homicide cases roll up on a residence and draw their guns upon approach. Problem is, they draw when out of the car and close to the building. Running back to the car made Cole put his weapon away. Long one short; I was unable to retrieve my tommy gun.
That's my only real peeve with the game at the moment, the fact that my HMV bonus has been kind of useless (may prove more useful later on, though). I've pretty much loved everything else. Awesome atmosphere, obviously the acting is the best example of in-game acting.
It's not just the voices. The characters seem real because they are! Watching someone swallow, their adam's apple moving, their face muscles tensing as they look away, unable to look you in the eye.. you know that unless it's using MotionScan, no 'performance' from any character in any other video game will ever convince you. The bar has been raised. Very high! Even the next best game for lip-syncing etc doesn't even come close to L.A. Noire.
It's not a game for everyone, though. This reason is also the biggest reason that I like it. Ahem.. this game is SHENMUE-AS-FUCK!! Seriously nearly creamed my pants during the first mission as I was picking objects up and looking them over, referring to my notebook which was constantly being added to as I found out new things. SEGA have forgotten Shenmue, but Team Bondi haven't!
Obviously I'm not saying this is a Shenmue-clone or ripoff. What it does take from 'Mue it does so in the right way. It has heaps of it's own things, too. But as I said, this game isn't for everyone, and it's the same reason Shenmue isn't for everyone - it's very slow paced (meditative, almost).
Like Shenmue, you spend most of your time going around town talking to people, racking up clues on your latest lead, generally not hurting anyone or anything. Occasionally there'll be a shootout or fist-fight, but this is never the focus. Most pieces of entertainment have intense main components with lighter interludes for the audience to catch their breath before the next deluge of action.
L.A. Noire has it the other way around (like Shenmue). Lots of interactions with characters, lots and lots of dialogue (mostly in-game, not cut-scenes!), etc. It's a certain type of person's game. If not too late, I would urge people to not read reviews. I didn't, and just had a look at one. I didn't read it all, since in the first couple of paragraphs it already spilled the beans on some things that caught me by total surprise, specifically because I knew next to nothing about it.
Everyone's been saying the PS3 version is the one to get because it's on one disc. Reason enough, I suppose. What you might not know is that the PS3 version also has better graphics, which if you can't be arsed reading the article linked to, basically boils down to more and better shadows, better framerate, less pop-up, and heavier use of SSAO.
As ever, the difference seems more different when showed stills side-by-side (as those comparisons do). The actual difference is pretty minimal in motion, and when playing probably not even perceptible. If you've only got a 360 and think you might like this game, don't even doubt the 360 version. Get it!