I have two magnet "pincushions" , I have two types of basic pins, plus a regular pincushion for really fine pins. I tried to use the magnet for my superfine pins but it was hard to get them off. My fingers just found that a regular pincushion works best for the superfine pins.
I have seen some pretty amazing pincushions,and love them, some are more arty than functional, but still think they are pretty.