I honestly hate it. Out of all the times I had it used on me, 2 were actually to save me, the rest to troll. And it's not fun and it also kills people. And no, I don't piss healers off, people just find it fun to use rescue to kill or as a pet yanking leash.
As for using it myself, I've used it in LotA a few times but I mostly find it too clunky to actually rescue when needed.