I actually liked it.
They talk a lot about the songs they choose for the episode but they also explain some other things. I liked it because when you 've seen the episode, it's like watching it again, without your tv on...
Mark explain about the lucky bambo. That they just came with the idea that Lucas offered it to Lindsay. They didn't have planned that Lucas was the friend who gave it to Lindsay when they shot the 503. I found it interesting.
And, yes, for Brucas fans, Mark said that he knows, and everybody knows, Chad and Sophia have great chemestry. He didn't forget about that.
Do you know if they did commentaries for other episodes?