It's not too bad, I did it for me in under an hour and then again for my friend in like 20 mins. Just need persistence and a good attitude!
Winding down the achievement hunting...
96%+ Completion (170/202 games complete w/ DLC (Most Recent: Trials Fusion)
Halo Fanatic, Music enthusiast, Duck
(17355/17950 Total Halo Gamerscore)