I have a Bernina 820, which is now 18 months old. I bought it primarily because I wanted to do more of my own quilting on large quilts. Most of the time it works beautifully but every once in awhile it becomes very tempermental and I can spend hours trying to get it to free-motion quilt. A perfect example is yesterday when I was 3/4 through quilting a quilt (it had worked beautifully all afternoon) and for an unknown reason it decided it didn't want to stitch correctly anymore. It took me well over an hour to get it to work correctly again. This kind of thing has happened a number of times now and I have had it at the dealers at least three times. I have found out in the last months that these machines, as a model, are quite tempermental. I am wondering if I could take it to a Bernina dealer and work a trade for another Bernina machine. I realize I would take a significant financial loss but it might be worth my sanity. Also, can anyone suggest a Bernina model that is reliabable and not so tempermental. I'm sorry to ask such a dumb question but I only hear about people trading up!