I have one--bought from my son who bought it used to do car upholstery. I'm not sure how old it is, but is a 206RB. Does straight stitch only, forward/reverse, walking foot. Think it uses a #19 needle--don't find those at Joanne's! They do take a bit to get used to as very powerful, so when you push down the foot pedal, it can take off on you. The other thing I learned is that to get the presser foot up, by stepping barely on the foot pedal it disengages the clutch on the motor and makes it easier to lift that presser foot lever. They will sew through anything--leather, multiple layers of denim, etc. I haven't used to quilt on it but have seen it done by a company in Stover MO where they had an overhead track system and "frame" clamps for the quilt that they then did edge to edge designs on the Consew machines--it was mesmerizing but think the learning curve would be steep!
I have used for upholstery and bag projects.
Other nice thing about it is that it's easy to maintain as all mechanical except the electrical motor which is placed where it would be easy to replace if it quit.