Overall, the episode was fun to watch. But that's it: fun to watch, not to follow.
I agree with many reviews: Asthon is playing Kelso... again! His role as an "I-don't-know-how-to-do-anything-in-life man" is just an insult to all viewers who expected something a little more deep in the character's ellaboration. Seriously guys, what were you thinking?
It's also a pity Jake has had such little participation. Yet, I understand these two first episodes were meant to present Walden, and to forge his "friendship" with Alan. I guess we'll have to wait in order to see if he'll have any serious participation whatsoever throughout the season...
Most important, I really can't understand the casting of Judy Greer. During season 4 she portrayed Myra, Herb's sister. And she had a one-wedding-stand thing going on with Charlie, until she ditches him because "she was getting married". First I thought cool, there's a secret link between Myra and the unknown Walden's wife. Until it was revealed she was named Bridget, had been married for over 16 years, and Alan had absolutely no memories of her. Bummer.
So... the thing is simple. The series has lost its biggest assets... from Charlie, to the spicy humour surrounding Jake, to coherence. We are left with Kelso (and Kelso alone, nothing else) plus an overacting role of Alan (way to Alan-like in every scene... no self respect...), and I guess the only good thing so far, Holland Taylor's deeper involvement in the show...
So... plain simple, it's fun series to watch, but it's not a fun series to follow...