I'm not running one. I consider those to be a solution looking for a problem. I know marketing is basically that it keeps coking off the back side of the intake valve. That was an issue with BMWs long ago. A problem they resolved by different injector placement. I'm not aware of any modern engine having this issue. And I don't recall this being a problem when FEs were rolling off the assembly line. I took many apart back in the day and never noticed but very mild debris on the valve. If you are choking your engine with crankcase fumes to the point you coke the valves, then maybe you should look at why you have so much crankcase vapor.
