Has anyone used the quilting rulers?

The ones that attach to your embroidery machine take a bit of practice cloth first before launching on a project, but give an excellent result, with practice. You will have to get "the feel" of each shape of ruler, how fast to stitch, etc.

There are tons of quilting rulers of all sizes and shapes... Are you talking about the free motion template rulers that are used with the special ruler foot to make quilting designs and shapes? Like the Westalee type template rulers or ????