I was gifted something similar for my “Big Green Egg” (which was also gifted to me - both third hand but I’m not complaining). I’ve never tried it . . . have you? It seems unnecessary on my BGE since I seem to be able to hold a temp pretty well so far . . . . curious others experiences with these blowers on their grills.
Yes, I’ve used it a few times for slow-n-low on my Egg.
I’ve yet to try it to hold pizza and roasting temps.
I think the main advantage is that it gets you to your desired temperature quickly without under- and overshoot and corrections. It also frees you to stop paying attention and opening the lid. With a blower running, there’s really not much need to adjust the top damper or the bottom draft. Finally, when it’s paired with a TW air probe set at the grate level, you know your brisket is cooking at 225F–my dome thermometer is usually off 25-50F.
The Billows has an “open lid” sensor, and a much higher CFM output than comparable units
I confess it’s a bit fiddly with all the leads, cables and extension cord…