Image quality is not good on my Fujifilm X-T20. The Samyang/Rokinon 12mm is a much better choice. Also you can't use screw-in filters with this lens.
This is a great lens. I love it. The focusing and aperture rings feel really great and solid. They also don't make any noise, which is great for filming. It feels really sturdy and the picture quality to me, seems really good. It is sharp.