One of the LQS has a BOM sew along and they use her templates. I had to purchase them to be able to participate in the BOM. I cut out the first pieces last night and sewed them together. Everything went together nicely (only lost one point when sewing and that was user error). I did enjoy using them since it was much easier cutting out shapes when working with a limited amount of fabric. Less chance of "oops" when cutting out with the template vs traditional rotary (in my opinion and with how I usually cut).