I have a Flame Boss 300 and 500. Not sure what type of smoker you are looking to use one on, but for an insulated vertical cabinet they work great. It is the only type of cooker I have tried them on.
I've had a BBQ Guru DigiQ DX2 for many years and it works flawlessly. I've used it on a Weber Smokey Mountain, my Primo and always on my Stumps Stretch. Highly recommended.
My first was a Pitmaster IQ. Garbage. Internal electric connections fell apart in 2 years and let me down at a very bad time. Replaced with a DigiQ. Rock solid and works great. I only use it for overnight cooks though.
Iām getting a Shirley big step up in the style cooker I am cooking now so itās finna take me a bit to get it down... figured fireboard would help me learn it