I took a chance at the recommendation of my Weber dealer to replace my old Weber handheld probe with the iGrill.  I was constantly frustrated with my old Weber probe but the iGrill is fantastic.  It maintains good contact with my iPhone 7 and I can even leave the phone within bluetooth range and get the readouts on my iWatch 2 anywhere in my house Wi-Fi network.  The ambient probe give me my grill temperature and the other three can go into different parts of the meat to ensure the right cook everytime.  No more guessing!