30 days return. Buyer pays for return shipping. If you use an eBay shipping label, it will be deducted from your refund amount. Policy depends on shipping service.
I've been exclusively using G.Skill Ripjaws RAM for about 6 years now. Never once have I had an issue with it. I trust G.Skill Ripjaws RAM with all my builds now. I also like the clean look of it. It doesn't contain those ridiculous LEDs found in other RAM, "oh look, my RAM has lights", LOL.