Completed once on Legendary solo, once on Normal solo, and a combination of Legendary/Heroic in co-op.

I always play SP first two times before moving to MP.

My first play through of Halo 4 was a Lone Wolf Legendary run

So freaking epic

Anyone else think Spartan Ops is sort of meh? Don't get me wrong I don't think it's bad I just don't find it extremely enjoyable.

 I haven't played much of it but I definitely find the CGI cutscenes more enjoyable, I 've watched all of them.

First time, completed heroic solo; second was legendary solo. Right now I'm going co-op on heroic. Playing it on legendary solo, it's harder the first several levels imo especially the levels where you flying a banshee or driving a vehicles. You'll run out of ammo fast, so make sure your shots count. I don't think it's the most difficult (halo 2 has that crown), but it's up there.

So I've always played Halo games on Heroic, found legendary too difficult. But this time around I started on Heroic and it was beginning to feel less challenging. So I switched to Legendary and definitely got a nice challenge. Shutdown and Forerunner were brutal on legendary.

It is also meh...  CGI is nice but it doesn't had that magic that firefight had in Halo Reach. 

^Crazy to think I might have played against them and not even know lol

Halo 4 Spartan Ops - Behind the Scenes 1