is the latest example of a userland jailbreak. While it is super easy for users, p0sixninja noted some of the disadvantages of this type of jailbreak.
“The only problem with this method of jailbreaking is it can be easily patched by Apple in the next firmware update. Also, since the exploit being used resides in userland, you’re denied access to many of the low level hardware features, including the ability to decrypt firmware keys. iBoot exploits, on the other hand, are much lower level and offer much more freedom to interact directly with the system unrestricted.”