I have tried Gutterman, Coats Dual Duty, and the Connecting Threads brand thread and have found that the Gutterman and Coats brand worked best in my machine. I wonder if it has anything to do with the automatic tension feature in my machine, but really those just work best for me. Though I love the connecting threads colors, their prices and just how it feels however I think I like the final look of the Gutterman and Coats brand produce. I have a Singer Confidence btw and no experience with Janome yet either.