My jailbroken ipad (3rd generation) enabled me to do some customization I really liked but also came with some changes I didn't. The safari tweaks (more gestures, adblock etc.) seemed to come at the cost of loosing the buttery smooth scrolling while web browsing. Safari hung more, was wonky and overall just wasn't as fun to use while Jailbroken for me. I'm now on IOS6 and prefer the overall experience. I'm sure there are others with more skills than me who can work around or just live with these issues, I enjoyed experimenting with jailbreaking, but it's just not for me for the long haul.