I bought a Janome 1600 for about $2000 and have had nothing but trouble with it knotting up and making thread nests on the bottom of my fabric. The dealer tells me it's the thread, but I have always used Gutermann thread and had no issues whatsoever. It's an excellent thread. Another Janome dealer that I spoke with at the TN Quiltfest says I should NOT be having trouble with Gutermann thread. So, who do you believe??? For me, that was a lot of money and I feel like it was wasted. I wish we had another dealer in town. About ready to take this one back and ask for my money back. Wish now I had just bought a used Bernina off ebay!