So, nearly a week later with the iOS jailbreak:
Use the newest version. The 1 year enterprise cert is basically a necessity if you ever reboot your device, which most people will end up doing. The cert on the older English version is 7 days and it's a semi-untether, meaning that you're going to end up having to reinstall the jailbreak after a week if you need to reboot. The Chinese version uses the 1 year cert as well.
Other than that minor issue, it's pretty rock-solid. I haven't had any issues, all of my favourite tweaks work (minus the ones that were never updated for iOS 9 in the first place) and the fuss of having to run the PP/Pangu app after reboot is minimal. Only takes a few seconds. Oh, and the whole thing about people being hacked after running the jailbreak is horseshit.
9.3.4 is out and fixes this jailbreak, so if you want to do it, don't update.