What's your opinion of L.A. Noire thus far?

Went to Gamestop today for some trade-ins, didn't even know L.A. Noire was out and ended up snagging it for $14. Been at it ever since (besides a break for Conan) and I'm pretty impressed. For starters, it's 3 friggin' discs, but if you like immersive storylines it has one. The gameplay is basically a 1940's GTA. Moreso than The Godfather as this is a Rock Star game. But the added elements of investigation and interrigation are really fun and become more challenging as the game progresses. Anyone else pick it up today or have a different opinion? J/w...