I've been using AC Infinity equipment for a few years and recommend them highly (except their lights). I've used Pulse and Inkbird previously but retired most of that gear two years ago in favor of AC Infinity. They're very well priced, highly reliable, the sensor is very accurate and it reports every second. I've run the Controllers via WiFi but not Bluetooth. The only issue I've had is that the glue that holds the magnet in the body of the Controller so that it sticks to their little equipment board gave melted when temperature in the tent hit 85 or so. Other than that, no complaints.
I have a 2' x'4 tent that uses a Controller 69 Pro + to control a 6" fan, a 6" oscillating fan, their small humidifier, their heater, and a 4" inline fan, I've used it to control a heating mat for a grow dome and have used their adapters to control a Mars SP3000 and an SP3000R.
No issues with things not "operating properly". Each device has its own lead that plugs into the body of the C69 and electronics on board determine the device type and control it accordingly.