I have a DP Edge 540 and it is the best flying plane I have ever had. When I was building it I was missing a couple small bolts for the wheel pants. I sent DPM an e mail. I received a reply within a day or so and had a whole entire hardware bag sent to me free of charge, which I received in less than a week! I also had several questions about setting this plane up and engine selection. DP personally answered several of my e mails in a timely manner with sound advice. Customer service doesn't get any better than that.