I've only had my Pitmaker Safe about 6 weeks.
No Guru or anything else.
After using a ceramic Kamado for 15 years, I've learned how to "sneak" up to my goal temperature.
Start with a small fire, get the draft started, and make very small adjustments to the in and out vents.
Note: after making an adjustment, wait 30 minutes before correcting. With a well insulated smoker, changes take time and over shooting a temp is very hard to bring down.
I now know where my vents need to be for various temps.
PitMaker Combo - Safe & 30" Grill Meister