Well, lets see. I have a magnetic pin catcher and one of those magnetic wands that sit just to the right of me in front of the electronic control panel. 6 years and no problems. The biggest glitch in my sewing system is me, the operator. I'm sure if they were not recommended, then companies like Dritz and June Taylor would not sell them. Hope that eases your mind. :-) Maybe others have a differing opinion.