I love my Bernina 830. I purchased it almost 40 years ago, and it's still great. Metal gears, not plastic. I just use the straight stitch, zigzag, and the 20 automated stitches. I have several foot attachments that I don't know their purpose. Self-taught; never took a class other than Junior High homemaking.
P. S. I just discovered what the foot with a circle end is for (free motion quilting)! It's like having a new machine!