I took the liberty of purchasing a JG G36C from Airsoft GI on the 13th of March - received multiple e-mails with updates on the product, and a UPS tracking number. It arrived the 21st, without any problems. I'd purchase from this retailer again.
Well I just bought some goodies off of their site and am overall, pretty pleased.
I haven't actually received the package yet BUT...the delivery date was for June 9th...a day after Gold Rush II, so I contacted them and they gave me FREE 2nd day air to help me out and to compensate for the free shipping I did not originally get.