I just installed my C1304DA. First impressions are bad. The only way it can find the com port for the GPS is to reset the whole unit. there must be a problem so I have sent an email to them but no reply yet. The radio reception is bad but I will try a new arial and see if that makes a difference. The screen is loose and I think it will rattle on a rough road but some foam behind it may fix that. The TV antena cable is too short to make it to the roof and I cant even get reception parked at my house.
Like I said my first impressions are its a piece of shit but If I can get the GPS to load and function properly I would be happy for what I paid. It didnt come with any installation instructions or GPS operating instructions but it does refer to a GPS manual in the owners manual but they never sent one to me.