I bought them and tried one, and really did not see any difference! I too, have a top loading bobbin in my Janome. It is a 9000. One day my machine actually ate the genie! Somehow it came up over the bobbin, got stitched a few times, and then the needle tried to pull it through the needle plate hole. :shock: (Not a single needle hole, but wide for embroider.) That kind of turned me against the genie!
Dawn
In beautiful Northwest Montana