Same problem here (double image of the controller and attached meshes, everything else is fine). I started the project with only a few static meshes and static lights and disabled everything I could to get all the performance I (might) need. Playing around with different rendering options in the project settings did not help at all. All other Steam VR Games/Apps (30+) run without any issue.
Win 10 64bit / UE 4.11.2 / NVIDIA drivers 364.72