Everyone should be warned that if something goes awry during the rooting process, like a loss of connection with the pc, a power loss, etc, you will brick your device. Unrecoverable. And if you take it in for a warranty exchange, they will laugh at you and throw you out of the store. You're totally on your own.
And if you root your phone and then something else breaks. like the screen, you're on your own. Warranty voided.