well first of all jailbreaking will void your warrenty that is for sure on the other hand i did it my self few times and everything has to be done just right or process wont work and it will eventualy crash your ipod which is no big problem you can doit over an over untill you get it right i guess

jailbreaking will get you frew free apps an cydia on it nothing more i personaly dont care for it i did jailbreak mine an then i did it back restore to normal state every jailbreak will erase everything so you will have to reload songs on it again an do all that work, as i like my songs to be in folders by genre by language and so on it takes long time for me to re do that again so i avoid that other then that awesome lil gadget