I have 2 Berninas Activa 240 and Artista 630 special quilters edition.
Love them both had Activa 6 years no problem,Artista 8 months no problems so far wonderful machines .I always have mine completely serviced and cleaned once a year They are high ticket machines and I want them to last.I always remove pins to prevent damage to machine.I was having a problem with thread nest a couple of weeks ago,my machine did not like the type thread I was using in bobbin once I put in a different brand of thread it did fine hope this helps.