I liked using the Igrill for monitering my pit temperature when cooking low and slow and use the other probe for monitering the food temperature. It worked great about 3 times then one of the probes failed. I called customer support and was told I could buy another one. so now I just use the one probe. It works as advertised and beats getting up every 30 minutes or so to check on your dinner.
Good for slow cooking, however if you want to sear a steak or cook past 400 degrees, this item is worthless. I use it on my Primos grill (ceramic "egg" grill) which cooks burgers and steaks better at around 450+.