I've heard of it and have taken part in a couple mystery quilts. What I like about Cindy Roth's mysteries is they are 2 parters. One part is the piecing of the quilt and the second is the machine quilting. Lots of fun. The machine quilting is geared to all quilting machines; short, mid and longarms.

there are plenty of free tutorials on the site as well.

One thing I will admit is I don't like how Cindy quilts her feathers. There's something about them that don't look right...but that's me!