I have bought stuff from komplett with no problems
...Until the printer I purchased went faulty. They wouldn't collect faulty item so I had to send it a my cost, they don't handle returns themselves and it was shipped to someplace in europe for checking before they issued a replacement.
...which was also faulty. So I had to send that back at my cost again, this time I demanded a refund but service was extremely slow and evasive. Eventually got my refund but they 'forgot' to refund the shipping costs I incurred so I'm still waiting for that...
Very poor backup service...