At first I didn't like it, had even plannd to return it but then once I actually started using it,corectly I might add, I use it all the time. All the time, my dear friend just thought it was awesome and wants one, so I got her one for Christmas,using a coupon of course. I know they don't work on some machines though. I have old vintage singers and some newer Janomes, that works well with it. So, yea I think they are worth it! Try it and if it isn't for you, return it!