Hi I am Leonardo, and I main this cube due to its nice turning and magnetic feel. I do say that I rather this way more than the RS3M because it just feels better out of the box than the RS3M, setting it up with the tightness being the same, and just adding nebula makes it really good, I have performed better with this cube for a month than with the RS3M for a whole year.
My best with the RS3M: 15.80
My best with the Rubiks speed cube: 13.65
A huge improvement and I congratulate Rubiks for making a decent speed cube, but it is really similar to the Swift Block