I don't seek it out, but the recent episodes I have seen have been decent enough to make me watch them while doing something else.
They shifted the formula a little so that you don't know why/how the murder occurred.
I just watched the one with the chess genius, and I thought it was interesting in that the villain was pretty much in Monk's face about how he did it and stuff but even then that wasn't enough to get a conviction and Monk only figured it out when the chess genius had a slight slip of the tongue about a common chess move which was vastly overstated in its importance.