I ran mine yesterday with my kettle set at 300 with top vent wide open. I was cooking a 13# packer. Had my maverick running to. I was getting temps from the maverick from 187-315 during the cook while the IQ held a steady green light. IQ temp probe was clipped to the grate handle. We had no wind but outside temp was low 50's to high 40's. Thanksgiving I had trouble pushing 250 while it was low 40's-high 30's outside so I just cranked the heat dial up. Just my experience in the short time I've had my IQ.
22.5" WSM, 18" WSM, 22.5 Blue Weber OTG, 22.5" Weber OTS, Weber BabyQ