Educate me on the Amity Single Disc Drill

Anybody out there run one? Likes, dislikes? Basically I want to know anything you know about them.

Bearing reliability? Disc change intervals? Problems? Maintenance? Soil type you seed? How it seeds? Depth? Crops seeded with it? Anything you'd change on it?

Tell me all about them.

Educate me on the Amity Single Disc Drill