How far are you into the game? For me, exploring a beautiful post-apocalyptic world with interesting characters and plot-twists was a top-flight gaming experience. I also enjoyed the crafting system and the ability to upgrade weapons like in Resident Evil 4. The fungal zombies were original and pretty cool too. There's also how the enemies in the game behave and talk like normal humans instead of mindless cliche thugs like in most games. I also appreciated little things like how all the bodies of water were different instead of just one cookie-cutter type of water, if that makes sense, it really added to the immersion.
The music, graphics, voice acting and story were all excellent. The gameplay is kind of similar to the Uncharted series, imo. By the end of the game you may be wondering who are the bigger monsters in that setting, the zombies or the survivors.