I recently finished Horizon Zero Dawn, with about 40 hours of gameplay. I really, really liked it!
Beautifully crafted open world, with tons of truly varied environments and a constant feel of threat. From deserts to deep forests or cold mountains, every place in this game is really well made and immersive.
I also enjoyed most of the combat gameplay aspects. Fighting most machines is pretty fun, and it's very interesting to see how differently each of them acts accordingly to the animal they represent. Some of them (Stalkers specailly) are really smart btw!
The story starts as some kind of uninteresting and generic tale, but it actually evolves into something way deeper and more interesting than I could have imagined - it became really good and interesting, and I totally want to know how it will continue in the next game.
The bad things imo were: a) the horribly long and hand holding tutorial with kid Aloy; b) bad inventory management system; c) bullet sponges human enemies with bad AI; d) some frustrating and bad designed hunting grounds. (even though I got a Sun mark in all of them)
Since the good aspects far outweighs the bad, I believe I could give this game something about 8.5/10 if I had to score it.
Now I have bought Spider-Man, The Last of Us 2 and Ghost of Tsushima. Am unsure which one should I start next.