Finished the game and immediately thought "Yay, it's Halo 2 all over again!

"
last few levels are where it actually got really fun. Story was pretty good but should have been longer. Those stupid walk around "missions" are lame and shouldn't have been separate levels but instead tacked onto the other ones. Very interested in seeing where it all goes from here and had been following up on the comics to bridge Spartan Ops and H5 to see how it got to the start of the game.
Did like team mates though everything I read about them being smart and helpful is over exaggerated.