Totally awesome. It has all the commentary that the Summer of S&M will bring, plus all kinds of other crazy stuff.
My favorite of them all was the Blooper Reel. Absolutely hilarious, especially Max's lines, i.e.
"Oooh, this reminds me of that internet game where you look at shifty strangers and (gasp) have to decide when to breathe! *cough cough* "
Absolutely amazing. So far I've watched the Blooper Reel a total of 5 or 6 times.
The rest of the disc is great, too. The commentary on Bright Side of the Moon was awesome, although I didn't pay attention to most of the commentary because I was looking at the game.
The concept art movie WAS AWESOME!
It showed most of the prototype characters, and even some "deleted scenes" (sort of).
A shot of Sam & Max in Hugh Bliss uniforms (white suit, rainbow tie, white pants)!
A shot of Lincoln carrying the Desoto up to the moon!
And, it has some really cool music as well. For example, it has an extremely weird remix of The Office at the end of the BSOTM commentary.
Overall, I give the disc a 9/10. If you haven't ordered it yet, get it, and only pay $6 for the shipping. It's more than worth it.