I'll have to agree on the lack of warranty. When I picked up my C-One, it took 4 months for him to send him a flash chip to make it work. I later picked up a RR-Net card for the C64, it didn't work. Protovision told me that they wouldn't support me and to get with Jens. 4 months after repeated emails to Jens, I was told to send it back to him. 3 months after that I asked where it was and was told 'I never got it' and never heard from him again.