Selling my Magic Keyboard for iPad Pro 12.9 Inch models, bought around the same time as my iPad Pro, and haven't used it as much with it. All keys and the touchpad have been tested to be functional, and don't have any signs of damage to the magnetic dock connector or the keys. 

The Magic Keyboard also has a passthrough USB-C port on the hinge, making it convenient to charge the iPad while docked.