I bought this for Thanksgiving - had a 23 lbs turkey to cook on the weber.  I stuffed the bird and put it out for the required 4-5 hour cook time.  But even though I the grill temperature was 350, the bird was cooking way too fast.  You could tell because of the graph on the app.  I lowered the grill temperature a few times to slow down the turkey cooking time.  Without both of these sensors, the bird would've been done waaaay too early.  One of the best turkeys I've cooked for the extended family!
The temperature graphs were fun to show off.