I see several replies but not to your question directly...about value. Are they worth the money? Holy Back-stitch, Batman...$90????? I see 2 replies saying they have this too but never use it. Seems like trying the pressing and 1/4" suggestions would make sense. Then you still have your $90 and you will have learned how to manage your stitching so it can be done anywhere at any time, even if you don't have a Steady Betty. Good luck and please let us know how you choose. I have found mastering the 1/4" seam the single most important, and illusive, skill.