Spirit is hands down the fastest and the easiest Jailbreak for the iPad, iPhone & iPod Touch on Firmware 3.1.2 & 3.1.3. But recentlly Spirit Jailbreak stoped working becuase of the iTunes 9.2 Rollout. Good News is Spirit has now been updated to work with iTunes Version 9.2 , so if you want to Jailbreak your iDevice that is on Firmware 3.1.2 or 3.1.3 you can still use spirit!