Arrow, I think Hevsi (from the old forum) did a review of this.
Just checked, she didn't, it was a Ruby zig zagger that she reviewed. I'll put the link up anyway, as it may be of interest. Hevsi, reviews 2 buttonholers, the Singer (non-template) and the Greist. Her reviews are in-depth, and full of useful information.
https://edsmum.wordpress.com/category/attachment-reviews/page/2/Enjoy.
Jessie