I enjoyed playing season 1 and can't wait for season 2

Definitely worth playing if you enjoyed the full game

If you've played Season 1, and you can get this on sale, I'd recommend it, but for me (being a total cheapskate) I wouldn't have paid 5 bux, though I was glad to get it for what I believe was $1.25 on sale.

so I'll simply state that the additional content (400 Days) fits nicely next to the base game play and story wise

Not as good as the original story but still worth playing