the mild let down is long and gone, but not for some people
All in all, if you're a diehard fan who hasn't gotten this yet?, then get it. But if this is your firxst foray into the series. Get Halo 1 first for like 4.99. That is the best bargain. Your not missing out on much for the single player.
For multiplayer, its the contrary.You can play as either an elite or spartan; equally good. Not much else to say, but its a bit of a tradeoff between single and multiplayer