Cecilia,
I have several of the binding attachments. They clamp to the bed of the machine rather than the presser foot bar. I like them. Get the binding started and the attachments folds and wraps it around the piece as you sew. Then only thing I've had trouble with is sometimes the fabric wants to back out of the slot it needs to pass through on the binder.
You've got to pay close attention there and keep the fabric positioned properly. These tools make binding easy.
I like the 201s as well. I rarely use mine cos it's in a cabinet upstairs and I do most of my sewing downstairs.
But it's a working machine and will get the job done.
Joe