The campaign for this particular Halo was about as meh as it gets and I truly struggle to remember anything from it, other than that absolutely huge motherf**ker of a truck that you could p**s about on for a mission. Spartan Ops seemed like a great idea at first, but it just became so repetitive and stale.
The multi-player, however, was an absolute delight for the first month and is easily the best competitive online play I've experienced this gen, but then the Crimson DLC came out and it all went a bit wonky. Thanks to that, usage is starting to drop off leaving a relatively normal person with a job and who plays other games facing off against players who have DRs well over a hundred (that's got to be at least 100 hours worth of game time) and know every pixel on every map, and that's really starting to suck some of the fun out of it.
I'll stick with it because I bought the map pass, but even I wonder if I'll still playing come April for the last DLC.