I have been using Mamba Black Ion Rough in my Head Extreme Pro for the past 2 weeks.
It is a really good polyester string. Ball pocketing is really good. Spin is good too but not crazy spin. I normally use Kirschbaum Pro line II and this string is at least equivalent.
Science is not consensus. Science is not up for a vote. It's not a political contest to win. But that's what it's become.