I had one & loved it, used it at classes & Stitch Camps, always performed well. I took it to a family reunion in case anyone needed clothing repairs, my oldest granddaughter also loved it so it went home with her. Mine is about 10 years old & still going strong.
As for bouncing around it depends on what type of table it is on, just put a piece of rubberized shelf lining or an inexpensive yoga mat cut into rectangles for machines to sit on, cuts down on noise & bouncing, especially on plastic tables that are in most community centers used for retreats.