I have had my Pro just short of 6 months. Have smoked, cooked at mid range as well 650º pizza. It is used almost daily.. It took a while, then it hit me, the minute amount ( virtually none ) of fly ash on and above the cooking area..Below is a different story.
Ash, as found in my former pit..The former pit had a fairly even distribution of ash throughout..
I have been using the same pellets for years so that isn't a factor.
A hidden plus was found.