Rigol power supplies are junk. Cheap, yes. The early designs were done by neophyte engineers and Dave's teardowns and repairs prove that. Perhaps they are better today, but when they were fist released I got a loner and was not impressed. I swear by Agilent and Rhode and Schwartz lab supplies and have used them for over 40 years. If you can afford something better, then do so, otherwise you will find yourself repairing it when you have other stuff you would rather be doing. Do you like to drive your car or spend time fixing it?
Different strokes for different folks, I guess. Remember Dave gets this stuff for free so companies like Rigol get free exposure. Dave does not have to play favorites here and so you get the real picture from his reviews and teardowns. So far, Dave has validated my initial opinion of this PSU. I have some Rigol gear and am quite pleased with the performance and price point. Big negative for Rigol is their software is pathetic.