After my father retired, he spent several years trying to build a motor that ran on permanent magnets only. I helped him, off an on. This one looks a lot like some of his later designs... but they never ran by themselves for very long, and you couldn't pull any useful load off of them. If they're claiming otherwise, frankly I'd have to suspect fraud until proven wrong. The problem is that the repulsion/attraction effect wants to balance out after a few cycles, so you try to use cams to pull the magnets in and out of contact. The mechanical loss of efficiency means you lose energy each cycle until the motor stops. Meanwhile, you can't put a load on or it stops that much quicker.