So installed this and its fine but cydia won't open. Not clear on the fix for it. I hope someone knows, thanks so much! I know it's tethered, Im going to install the semi-tether but I can't until cydia opens for me.
After you jb you need to reboot tethered once before Cydia will open.
Go into extras and select "just boot". Enter DFU mode and it will re-boot tethered and you will then be able to access Cydia. I had to do the same this morning when I jailbroke.