Yup, this one's a snooze fest. No way around it.
I agree with those who are saying to not do any more than one case a day. If you do any more, you might never wake up.
Also, were people saying earlier in this thread that it could get too "gamey" at times? If so, are you people serious? This game could not possibly be any less of a game than it already is. Everything is either heavily automated (like the chases), or completely arbitrary (like the interrogations). The only time I ever felt like I had any control was when I was driving, and after spending about 4 hours driving back and forth between locations, I'm bored to death of it and am just telling my partner to do it.
Thank fuck they decided to let me shoot a few guys every couple hours. Without the "gamey" sections, LA Noire seriously could not have been passed off as an interactive experience.
It's not the worst game ever, but I find that this is one of those games that, while I'm playing it, I wish I was playing something else like Mario or some other kind of actual game. Hopefully this is not the direction that the industry is headed in.