I thought it was about right, only finished Halo 2 last wednesday and felt that went on a bit too long and from what I remember about Halo 1 that was very repetative. Had my doubts as if I should get it or not, for the last level of 2 I just ran past everything.

Certainly took me a bit longer than 8 hours to do on Heroic, 10 or 11 I would say which I am fairly proud of having completed 1 on easy and 2 on normal both on PC. Not sure how much multiplayer I will get out of it, I tend to suck at fps online

Certainly lived up to the hype for me, though had I not of completed 1 and 2 would of probably been a bit meh about it. Think it had a very strong ending as well which made me enjoy it more than Half Life 2 which had a crap ending. Even tempted to play through it again