I have had the Horizon for about 2 months, and I jumped from a very basic, 25-year-old White with 13 stitches to the Horizon. I didn't try FMQ for a few weeks, opting instead to "playing" with the different stitches and piecing with it. Hang in there. When I did try to FMQ, I loved it. I leave the feed dogs up, and I don't use a Supreme Slider, but do use the D1S stitch. Did you go through the automatic plate converter steps? I have had a few thread snarls, but after cleaning out the bobbin case, it was fine. Make sure your bobbin thread is coming out counter-clockwise. My tension is at 7. (I don't mess with that much). I find I really only use the 1/4" foot, the QVH foot, and the A foot. I may use some of the others when I make the draperies for our bedroom, but not sure yet.