A friend ordered stuff from there when it was reduced. It broke quickly though, so he wanted to have it replaced. Otto outright refused to handle it as a replacement, insisting on him getting his money back instead so he would have to pay the full price to order it again if he wanted a working version. It went so far that he contacted a lawyer about it who confirmed that Otto broke the according consumer law but that handling it via lawyers would be more expensive than just buying it for the full price.

Would never order something from them. Please do if you want to get screwed over.