I stayed on iOS 9.1 for potential Cydia app compatibility reasons, but now it's paid off to get this jailbreak. So glad. Initially, just after running the Pangu app that it installs on the iPhone, it gave me an error message saying that the jailbreak didn't complete and to try again. So, I did, only to get the message on the computer end saying: "already jailbroken". And so I was. Cydia was on my screen! Then, however, my iPhone would get stuck in a boot loop. I had heard that pressing the volume up button while pressing the power button can help (something to do with mobile substrate), which I tried and after a few tries, it worked! I was back on my home screen. And not in safe-mode, either. Hm... I really don't know if volume up + power is what did it. Seemed to work for me. I installed several of my favorite tweaks and they work well. But after installing Winterboard, which requires a reboot, I was in the boot loop again. And again I did the volume up with power button thing and it worked again! Winterboard and all my tweaks fine. Not sure if I can reboot again now without a boot loop. I'll try and post back here later.