Loving Halo 5 so far. Initial thoughts:
1- The campaign is really fun and challenging on legendary. I like the story, and the missions are set up with a good variety of environments, enemies, and ways to tackle encounters. Much more fun and coherent than H3 to me. I don't get the complaints about the story. I haven't read any of the books outside of the graphic novel, and I think it does a perfectly acceptable job of making it understandable. Coop makes the campaign even more fun, I like how each spartan is a little different.
2 - The multiplayer is super solid. Haven't had this much fun since H2, and to me it actually feels like a more worthy successor to CE because there is no dual wield garbage or item pick ups from H3. The gameplay is so smooth and solid. Hits and kills are satisfying. I think the maps are pretty good, midship is the best as always. Dedi servers and even balance is 100000x better than where Bungie went with Destiny.
3 - Warzone is a great addition, only needs a few more maps for rotation variety. It is a great, low stress mode to go crazy in and not worry about losing so much. REQ cards are super fun, but I have to get over my hoarding tendencies. Also you gain enough REQ that you never feel pressured to buy packs. I've unlocked a bunch of gold packs already just after normal play.
Overall I think this is the best entry in the series to date, and I've been playing since CE.
agree.