I (bitterly) haven't had the chance to try these yet, even though I'm a big fan of the original game. However, ACG has reviews posted of Part One and Part Two. In general, it looks like Part One is quite a bit better than Part Two, so I'm hoping the series won't enter a steep downward spiral.

I really enjoy the notion of episodic games, provided they don't get carried away and start doling up crap. Episodes should be spaced out at least three months apart. My guess is that once you get beyond that, stuff starts getting "slapped" together and formulas are substituted for creativity. Actually, I'd even be happy with a new episode every six months if it meant better production values, and I'm sure most people are of the same mindset. At some point, I'd be getting nervous that my queue would get too full, and I'd end up with far more games that I had time to play.

One interesting idea might be to follow the examples set by comics. Release very small installments, and at the end, release the entire game as one nice package. Comic story arcs tend to show up as graphic novels a few months after the arc is completed in the comics. Many people with limited time just wait for the graphic novels to come out rather than chasing down each new comic.