I only have my Brother PC420 Project Runway, but I love it. I really only piece and make purses on it, as I prefer to hand-quilt, but it has more bells and whistles than I will ever use. I LOVE needle up/down function, auto thread cutter, and needle threaded. Thought I would love the knee lift, especially when machine appliqué, which I have done a bit of, but since I don't do it often, it is hard to get use to. I use it for hours every day, so clean out the bobbin casing and area regularly. No problems with it it in 2 years so far, at least that weren't OPERATOR's fault!! I sure wish I had my mothers old feather weight that I sewed on as a girl, but my sister somehow managed to bag it after my mother died and won't let me have it, despite the fact she doesn't use it.