Still using the original straight probes that came with it. I did place them in empty smoker to see differences when bringing up the heat. As temps came up they were as much as 8-9 degrees apart, but after the temperature stabilized in smoker, they were back to the 2 degree difference I started with. I figure I will wait on getting another probe until one fails because I can always use remaining one for meat temperature. (The advantage of having 2 probes). I am more comfortable about the smoker cook temp now that I have done a few smokes. In reality, unless something goes wrong the smoker, temp should be pretty consistent.