First time I tried downloading the data packs, it told me I didn't have enough space. Duh! I have a 8gb Wii U, but I have a 320GB external 3.5 inch HDD which turns on automatically when the Wii U is turned on. Somehow it won't let met download it to the HDD and tells me to go into data management and delete some stuff from the internal memory. I select the HDD and go back out rightaway and i'm in the OS menu instead of bringing me back to the eShop :/
Now it lets me download to the HDD after i've clicked on it in the data management menu. Strange...
Anyway, I do like how you are able to select all the packs at once and go further instead of adding them one by one to your "basket".