I have about four missions of Halo 5 left. Overall, not really feeling it as much as Halo 4. For starters, unless I missed it, the game still hasn't explained what a Guardian actually is. I had to Google it to find out what all of these massive machines Cortana was activating actually were. The story is really a step or two down from Halo 4. The whole squad based gameplay with revives and stuff is weird, too. Sometimes I accidentally outright murder Buck when I am in a vehicle and he gets in the way and I can't revive him but at the next checkpoint, he's back.
The core gameplay is still great though. Covenant are kind of a bore to fight after the Prometheans. They have a few cool new enemy types and amazing guns. Covenant have nothing.