My wife bought me the igrill for my birthday and it came with two probes. The first time I used, it worked perfectly. The second time, I grilled a pork tenderloin and got the grill up nice and hot-about 500 degrees. Once up to temp I started getting an alert that one of the tenderloins was over temp, however the other was well below (about 100 degrees different). I tried repositioning in all ways but same result. The probe even reads about 100 degrees higher than the air temp when I have it just sitting on the table. Will give the benefit of the doubt and blame it on a faulty probe, but would like better quality control.