Yes, pretty much jump hight. Press a button, gives you a big jump boost and then the thrusters on your back let you down slowly. Hmm, that to me sound like a fun thing to do, but I think it's also a fair trait to have in multiplayer. You get an advantage as you get a bigger jump boost, throwing the enemy off and then slowly setting down on the ground making you quite vulnerable to a quick death. That's what I think anyway, who knows if this would even be implimentied into Halo 4 multiplayer, to be honest I wouldn't have a clue if that would actually work in multiplayer at all but I'd prefere that over jetpack.