The only disadvantage Is that the box itself is shiny and all your fingerprints stay there (yes, you might be able to see Which of your family members were using it while you were away;]).
By the way, When Using it for the first time it has to be formatted. There is a step by step guide to do it, but it works only once, so if you want to use this default wizard for that, do the partitioning seriously from the beginning, Because You will not be able to launch it again. Of course you can always change everything using your computer's software!