Note how they never show one being connected to a device inside a case. I bought one (at 1/4 the price listed here) from a direct-from-China manufacturer. The tip fit into my phone just fine -- but the magnetic connector was too wide to attach to it while in the case.
I'm much more curious about MuConnect right now. https://www.indiegogo.com/projects/muconnect-faster-safer-and-magnetic-charging-apple-android
Lightning and Micro-USB options, and it doesn't come with a cable attached, which is a major plus in my books. Micro-USB cables are cheap. Mine invariably break. Separating the magnetic connector from the non-repairable cable is a mandatory requirement in my books. At least so long as the magnetic connectors increase the price of the attached cable four-fold.
Oh, and as a bonus, the Mu is compatible with Qualcomm Quick Charge 2.0. I mention this separately since Qualcomm plays around with voltages instead of amperages.