TOP NOTCH customer service here. I originally purchased a sunpower 48" fixture and it was on back orders or a couple of weeks. It had shipped out on Monday not knowing and wanting to upgrade to the dimmable. Called up MD and yes there was someone to talk to. They got me a shipping label to send it back and credit my account. Amy at MD was extremely helpful on expediting this knowing I had the weekend off and wanted to get this up and running. I got the boxed in my living room waiting for install on sat. Can't wait. Just want to say thanks to Amy and the crew at MD for top notch service.