I bought this because the tutorial, which you also link in your app profile.
I am getting a whole array (27) of errors, here are a few:
Assets\SteamVR_Playmaker\GetControllerPositionAndVelocity.cs(7,30): error CS0246: The type or namespace name 'SteamVR_TrackedController' could not be found (are you missing a using directive or an assembly reference?)
Assets\SteamVR_Playmaker\GetControllerPositionAndVelocity.cs(13,14): error CS0246: The type or namespace name 'SteamVR_Controller' could not be found (are you missing a using directive or an assembly reference?)
Assets\SteamVR_Playmaker\GetGrip.cs(8,30): error CS0246: The type or namespace name 'SteamVR_TrackedController' could not be found (are you missing a using directive or an assembly reference?)
Assets\SteamVR_Playmaker\ChangeTouchpadModelController.cs(7,30): error CS0246: The type or namespace name 'SteamVR_TrackedController' could not be found (are you missing a using directive or an assembly reference?)