In the process of using it for my indie film!
This isn't the cheapie overseas Amazon-ordered $10 lens attachments. This is a heavy duty piece of "glass". It's heavier than you expect. But it's sharp. There is no distortion. If you want to take serious quality wide angle pics, this is your lens.
I'm not a pro by any means but can definitely see a huge difference in clarity when using these lenses. My photos and videos look way better.