The Belkin Qode Pro is the Cadillac of iPad keyboards. It comes with a shell for the iPad to clip into that works in conjunction with the keyboard itself. When you’re done working, simply pull the iPad away from the magnets in the base and supporting piece in the back, and the keyboard will stay behind, leaving the iPad in a thin rubbery case.
I’ve had this iPad keyboard since just a few days after Belkin released it and I love it. The battery life on the keyboard is amazing as well. I think iOS 9 will only make my decision to have an iPad keyboard all the wiser.