it MAY give usefull items (ppl already got PvE/PvP Armor stones), but it often gives ****. Why ? Probably because it was designed at a moment where they were planning P2W events, and if it gave you every item needed (for the price of the PA), you wouldn't buy Tarots, Caskets, ... The real question is : Why the prestige cube only gives useless items when it comes with a 60€ pack ?
Well i do get a nice item once or twice a week to enter ancient kartia, which is fun to play and gives great amount of XP