I have one and really like it. Someone posted one that they had made a small pincushion and glued it in the center.
Not sure who posted though, it was called Bobbin Holder Pincushion.
I have several and love them. I just realized the other day, though, that leaving them out on my sewing table they collect dust. I had a real chore cleaning them up. Putting them in the drawer from now on!