I've thought about getting one as well. I have a friend that races in a different class than I do, and he uses a weather station/ET predictor every round he runs. Last season I was heading into the semis and I was stumped as what to dial as I could feel the air changing. So my friend says let's see what the machine says, he ran the numbers and have me a dial in. I went with it and broke out by a ton! If I had gone with my gut feeling I still would have broke out but by a whole lot less! Not doing that again!