Have used it through (2) 10 hour smokes and (2) 4 hour smokes. Bought the (2) probe package. Love the app (IOS) and overall ease of use. Overall it has worked perfectly with the exception of one probe. Battery life is only 2 hours on this probe. Thermoworks tried to troubleshoot the app/probe over the phone about a month ago. I did another smoke yesterday and this probe failed again after 2 hours. After a call to Thermoworks today they are sending me a free replacement probe. Fair enough.