This sort of dealer talk is seemingly common. Who knows why. Use the thread you have - if you have problems, try something else. I use all sorts of threads on all my machines and I have some Essential thread as well. If something doesn't seem right, you can try another lighter thread int he bobbin, such as Masterpiece fro Superior threads, or something else and see if the machine likes that better, knowing you need to tweak tension from time to time as you change thread. Good luck, and happy sewing.
