Still can't wrap my head around the fact that every time I fly out of AMS priority people are mixed in with normal people, slowing everything down to 0 efficiency. Only time it netted me big gains was in cases where te regular line stretched all the way from lounge 1 to the KL BC checkin desks....
... In which case I could proceed directly to the front and made it through quicker than in the case of light loads en 'mixing' policy in effect :')