I have the one by Ann Peterson (Beyond Basic Machine Quilting), Leah Day (FMQ a Sampler), and Cindy Needham (Design It, Quilt It). Each has its strengths. I did my first feathers (1 month ago!) from what I learned from Ann Peterson, and they turned out well. With Leah Day, I learned that it doesn't have to be perfect, and she had lots of designs. I really liked Cindy Needham's way of basting a quilt - so far into the class, I think she's more into design and not as much into teaching the fmq. I'm glad I have all three of them - I think they complement each other.