DaYan FTO (Magnetic + Ball-Core)

The best we have at the moment. Pretty smooth turning, though it has a distinct feel to each turn. Catches are only an issue on very loose tensions. The puzzle's size may be a deterrent for some

I don't know how to solve this puzzle but it is quite fun to turn. It is nice and smooth. One downside - it does seem to catch a little bit and I could see that being problematic in speedsolves.