I am also late to the party but I need to say this because this game emotionally destroyed me at the end. The game mechanics are a bit hit in miss in each season but they try to evolve it. The story and characters, particularly Clementine, our protagonist, are the real heart of these games and by the time you get to the final season, your heart will be on a rollercoaster ride with her as we slowly make our way towards a conclusion to her tale.
If you're on the fence about whether it's worth the journey, I have never been as distraught by a video game narrative as the final episode of this final season. Absolutely buy this game and watch it and Clementine own a piece of your heart forever because of the journey you go on together.