To the point where even the Mossad were telling the CIA, "hey, guys, you should really knock off this 'torture program' thing, it's really not working for you."
If the Mossad are telling you to quit torturing terrorists, you might have a problem.
Aside from being cartoonishly evil, torture is really only effective as a political tool for garnering confessions. Even the Russians and the Chinese, no slouches for experience with the practice, don't use it for trying to gather actual intelligence. But hey, if you want someone to confess to a crime, or a plot against the CCCP or Putin, or that there's a link between Al-Qaeda and the Iraqi government, and you don't care whether or not it's true (or are actively putting your fingers in your ears and humming loudly whenever anybody points out that it is 100% false), that's the best method.
It does not, has not, and will not ever save lives anywhere except on TV. Not even one.