I just came across some post on a golf website that mentioned "The Maltby Playability Factor (MPF)" today and was intrigued to learn more about this.

That curiousity turned to horror as I see that the Adams XTD Forged irons that I play and love are ranked "Classic" and definitely not recommended for anyone with a handicap over 5. That made me wonder who did the ratings and how reliable they were.

I find the golfworks.ca page is more useful for looking up clubs but here is the official page:

http://ralphmaltby.com/maltby-playability-factor/

So...who tests and rates all these clubs? And given that Maltby is an independent but direct competitor to all the big boy offerings being rated, do people take these scores seriously?