I really didn't like 400 Days.
Honestly, the characters were well written and I did enjoy some of the situations; but everything felt incredibly contrived. The thing I loved about the Walking Dead was the fact that even though things were scripted, they didn't feel that way. The major choices came up at unexpected times, and were earned through building a ton of tension (or, in the case of episode 2, starting in an absolutely insane way). 400 Days doesn't have that. All of the stories feel like every choice you have doesn't matter up until one "big" one. Even then, those choices didn't really matter to me because I felt like the substance wasn't overly impressive.
I understand that having a bunch of short stories makes it harder to really learn about each character and develop them; but I sincerely didn't care about any of them. The ex-junkie? Couldn't care less. The murderer? Good voice acting, and like his writing; but don't care what happens. The girl and her sister? Kid annoyed me, older sis' was an idiot. The younger kid? He was fine, and I'd like to see what happens to him. The stoner? I like him, and would like to see him developed further.
By the end of it, I just wanted to be done. The reveal at the end that there was an epilogue caught me off guard, and I liked that; but the fact that only one person joined me (the ex-junkie) made me think "great, is that the only one that's coming into the next episode? Man, I hope this doesn't have too much bearing on the next season."
Sorry Telltale, I love the Walking Dead; but this was just... weak.