I got a Bernina 440QE. It would start sewing, then stop abruptly and refuse to start again. I was told my room was too cold. I started leaving the heating on all the time on high, but it still was faulty. Eventually Bernina gave me a new machine. I upgraded to a 630 later on. I have a really old Bernina (can't remember number) which sews easily, quietly and is not tempremental