When i got that for the first time in this game, i was excited since i didn't have any healing\rez job and thought i could use at open areas only to learn that you can't use at players that are not in your party plus not in combat and can only keep one, making a waste of inventory space.

Only good for deep dungeon but still dissapointing...
The only actual consumable that i use and never sell are the HQ Max Potions you keep getting in PotD: those potions heal well for ARR\HW content and have a shorter cooldown than Second Wind. So it is weird phoenix downs just feel meh.