Pay. When I bought mine they didn't have the Bluetooth one available.. not that I need it, and at the time mine was "State of the Art" and 269.00 without the adapter. Now the whole kit adapter included is under 200.00
I've delt with their customer service and they rebuilt my unit because of a moisture issue for 50.00 out of warranty. I was pleased.
The main thing I want to have is a consistent pit temperature and this accomplishes it for me, then second is monitoring my internal meat temperature on cuts bigger than ribs, like Brisket and pork shoulders. Can it be done cheaper ? Absolutely! Look into Auber instruments.. knowing what I know now, I might have leaned that way.. there are several threads on Smoke Ring Forums on how to build your own. Let me know what you decide and how it turns out