The YS3M now comes in 5 different options! This 20 magnet ball core version follows on from some of MoYu's other cubes with the 20 magnet ball core version such as the super weilong and weilong v9. The YS3M has a more stable feel and is used by some good blindsolvers, I have been able to get some pretty good times on this 20 magnet version, however I am very skeptical on the benefit it offers over a regular 8 magnet ball core.
Other Posts

YJ MGC Beta unboxing | did YJ finally make a decent 3x3?
YJ have made a lot of new 3x3s in the last 2 years but most have them haven't...

Was this a stupid idea?
I didn't think it would take me quite this long to solve a 5x5 mirror cube blindfolded but...

XuanYi Geng breaks 3x3 world record single with 3.05 second solve
7 year old XuanYi Geng broke the 3x3 world record single last weekend only two months after YiHeng...