Yes, I love my Berninas! I have old mechanical 540, 830, and 930. Plus a newer 230 and a 590 and a Bernina serger (made by Juki). I love all the bells and whistles of my 590, but have just given up getting the 1/4" seam allowance on it. I have my sewing cabinet set up so I can use my 590 or my 230 when I want to do piecing.
I am a sewing machine mechanic, and I realize that not everyone fully understands how to use a sewing machine. There are simple things to notice like pulling the top thread out of the needle plate hole before starting to sew, or holding your thread tail/s as you start to sew, keeping the bobbin area clean and oiled, not manually turning the handwheel, etc.
They're just machines. We need to learn how to use them. They can't learn how to deal with us.