User blog comment:BerryBandit/Mechanically demanding champions/Quick decision champions/@comment-5514182-20130623134713/@comment-9844148-20130624170418

I completely agree. Timing your ult can either save your team from dying or ruining your team from getting kills, so you have to know the exact right time to use it. Especially early game being able to react to the opposing teams moves and autoattacks really quicly with shielding your adc can be difficult. But Janna played correctly can be a huge game changer.