I did it. I held myself at 9.2.1, not knowing what the future held. With each new release I downloaded the IPSW, and waited. (Just to have it ready to go if needed.)
I did the jailbreak in the early hours of it's release, so I had a little trouble navigating the Chinese. I only had trouble at first because I missed the step to lock your phone. There are plenty of clear instructions now here and on the Reddit site.
I have have NO issues that I am aware of, other than a battery drain from Siri. I disabled "Hey Siri" and that went away. I don't know if that is related to the jailbreak, or from the 9.2.1 - 9.3.3 update.
My phone seems to run very smoothly, and I don't feel like there is "anything wrong" so far.
I know there are others that might be having problems, but they seem to be on the "lets install 50000 tweaks at once" group.
The more tweaks you install, the more likely you are to have a problem with any jailbreak, as they might be conflicting with each other, or not fully compatible with 9.3.3.