If your already jailbroken it’s best to hold off on today’s jailbreak for 8.1 to 8.3 released by TaiG. A lot of users are having problems with the jailbreak like it getting stuck at 20% and Cydia Substrate has yet to be updated. 

So right now the best course of action would be to get to 8.3 and hold off till TaiG fixes the problems with the Jailbreak tool and Cydia Substrate is updated to support ios 8.3.