Communication should be regaurded as extremely important in any transaction made on this forum. The main reason being that there are no garuntees that you will recieve your end of the trade/sale/payment.
I just recently made a trade with SuperSnSProductions and I rated neutral because of an atrocious lack of communication and his inability to answer my questions. We both ultimately received our ends of the deal in the condition we agreed on.
Neutral seemed reasonable and if anyone is still not convinced, please read the long description of the feedback I left for SuperSnSproductions.