This was a lot of fun.
Not as good some other parts of the series but still pretty good.
The story is a bit hectic to follow but it's still interesting. It's based on the game episode of the same name so I'll give them a pass.
Fills in the blanks between Biff getting the Almanac and the alternate 1985 with an amazing story. There's even a nod to the refrigerator from the original script.
There is a lot of back story in these as well as plenty of stories about what happened after Marty came back for the last time. The stories feel like a genuine part of the universe and not just a cheap money-grab.
I like the idea that Doc spent the time after Marty went back to the future trying to make sure everything stayed as it should so he would be able to "meet" Marty for real.