Issues? What do you mean by issues? That's kinda vague, so you might as well elaborate.
Anyways, downloading is pretty straight forwardprocess as you can imagine.
Step 1 - go to the official project webby http://learnfree.eu/?lang=en
Step 2 - At the top of the site, there is a toolbar and the first three categories read "USU desktop", "USU mini" and "USU netbook". By clicking on them you will get transferred to a page with the description (with screenies) of the edition and a download button.
Step 3 - You select and edition and click "Download" button which is at the top of the per edition page.
Step 4 - If you like the distro you should consider chipping in some bucks for it's authors from here: http://learnfree.eu/support_us/paypal_donation/
That would be all, it is quite easy and it's no rocket science, so the chances are you won't have issues with download the product.
If you still have any sort of issues don't hesitate to ask.