My friend has one, and I recently got to work with her in quilting something for me. She has the Grace frame. I know many people with long arm set-ups, and it seems like there is always some trouble - tension, thread breaking, etc. My friend seems to be in harmony with her machine, and it was so relaxing to work with her. I did all of the quilting, and the only problems we had happened twice when we didn't have the bobbin snapped in - user error. She has said as KLO has mentioned that you need to brush out the lint frequently and oil it a lot. It seems to be a machine that is NOT finicky about which brand thread you use.