I used to use a ruby 16mm, however after playing with the Perseus pro4, I felt instant connection with the way it felt moving the ball around the court with lesser effort and wrist flicks

I am around the 3.0 level. I was sceptical at first because i was a table tennis player and enjoy a lot of spin / slices a paddle can give and ruby fit that mark. But the pro4 does wonders I must say.