Been using one for over a year. First, I find the temps to be spot-on with all my other thermometers. Really like the graphical look and the ability to label and set upper and lower alarms on both probes. The ambient temp probe has a useful grate clip. I also us the data file export feature to send data to and excel spreadsheet to keep as part of my cooking log. I've pretty much changed to H&F cooks, but when I was doing overnights I would park my pit about 75-100ft away from my recliner in the TV room (through trees, walls windows, etc.) and had good bluetooth reception on my iPad and the alarms let me get 1-2 hour naps between feeding the fire in my RF stickburner. One negative: I've noticed that switching linked devices can be a PITA. I usually use me iPad, but when I want to use my iPhone instead I find I have to "reset" the whole thing so it will recognize the iPhone (it wants to keep finding the iPad). I would by another one.
Weber 26.75 OTG w/CI grates & SJ/WSM Mini
Home built 24"x72" reverse flow stick burner trailer with 18"x40" grill w/CI grates and upright SS gas oven/smoker.
Home built 48" fire pit with a 30"x30" Santa Maria style ranch grill.
Home built lump charcoal retort, iGrill & a bunch of other cooking toys.