Jetpack is confusing to use
HUD is messy
AIM ASSIST
Apart from that it's alright.
Oh also GFWL
HUD doesn't that messy to me.
Aim assist; not a fan of it either, but it's pretty useful when someone is being annoying and jetting around, and it's hard to shoot him.
Jetpack isn't confusing to use for me, just hold down the jump button.
PROTIP: Manual overdrive > Automatic overdrive.