In the last week I have jailbroken and then de-jailbrokened an iPad mini, mostly thanks to stupid little glitches that make me think the whole thing will just crash in the middle of something important like a round of Super Stickman Golf 2.
But if you have a hacked iPhone, you might want to keep it hacked fo a little longer, at least until you get to try the amazing Velox, a tweak that lets you use apps as little notification-center-style widgets right there on the home screen.