Just finished the game and I was very pleased with it. It's rare I know so little about a game while playing it, I really had no idea where the story was going or how things would end.
I also loved how this seemed like both a great re-imagining of the GOW series, but also a AAA sequel to the Darksiders games. It's got the fun puzzle solving and optional challenges, fast travel "corridors", loot, augmentable abilities, kinda similar magic/ability upgrade system.
I pretty much had no interest in a new GOW game, but this completely brought back my interest in the series. I look at GOW's tragectory similar to how the Halo series went. Loved the OG trilogy (Halo1-3 and GOW 1-3) and even some of the side games (PSP GOWs and Halo ODST), but both series' kinda lost me with their big Prequel games (Ascension and Reach).
Halo unfortunately totally lost me with its first attempt to reinvigorate the series (Halo 4), but GOW thankfully knocked it out of the park. It did just enough similar to the old GOW games (fun gameplay, awesome sense of scale, fun puzzles to break up the combat), but brought in so much new stuff that it didn't just feel like a retread (all new enemies and locations, total rehaul of the gameplay, total new direction to take the story in).
Cannot WAIT to wee what comes from sequel to this.