Also picked up Life is Strange on the Steam sale, another game that has gotten stellar reviews. I've only played the first episode, but it's very Telltale-esque, although with better graphics and more refined gameplay. It also has a neat mechanic where the main character discovers that she can reverse time, which essentially gives you a redo on major decisions should you want to see what happens had you picked differently. Of course, you can only do this in the immediate aftermath of those decisions, so there's no way of knowing how they will play out far down the line or in later episodes.
A fun side effect of this is that you can garner new conversation options at times by rewinding and retrying things, which allows you to manipulate people based on knowledge you gained before you rewind.
Really the only issue with the first episode is that some of the dialogue is pretty bad. You can tell it was written by adult men trying to write for teenagers, and sometimes the dialogue feels stilted and awkward as a result. It's not always noticeable, though, and a lot of the time it sounds fine.
The first episode does a nice job of establishing where things will likely be going. There's a missing girl mystery that will almost certainly be solved over the course of the game, an unstable kid with a gun at school, a missing gun from a friend's dad's collection (it's likely not the same gun the unstable kid has), and the promise of a massive tornado that will show up to wipe out the entire small town the game takes place in. I'm guessing the game will revolve around finding a way to avert that particular catastrophe.
Anyway, I've heard the game gets significantly better in later episodes, and the first episode is intriguing enough to make me want to keep going. If you like Telltale games, you'll probably like it, although the subject matter is obviously quite a bit different from their standard adventure.
And despite starring teenagers, it's not a childish game. It's rated M for a reason.