I’m two hours into smoking another 3lbs of beef pepperoni sticks this morning. My Pro 575 is set to 200F. RTD has been slowly cycling up and down between 185F and 210F. Smoke increases and decreases nicely. You can see from the photo that the oven thermometer is showing about 187F. I’m sure it would vary a bit if I moved it to a different spot inside the grill. The grill does very well at low temperatures and anyone who likes to slow cook would be satisfied with the way it is operating right now. The temp gap is mostly an issue at higher temps and I am only seeing a 30F - 40F gap at 450F. The gap is hard to measure because it really depends where the oven thermometer is sitting. The other point is that you have to use a temp probe that is designed to specifically measure air temp. Most of the probes I see people using to test their grills are contact probes that are designed for meat temperatures. Might be why there is such a big variation being reported.