I have one, and it’s a huge improvement over the bundled (very crappy) controller.
You have to be sure that your heater is compatible though, luckily mine is.
I now have it working over the internet via MQTT, so I can turn it on from anywhere (as long as you have an internet connection).
I also have it working with Alexa, so I can turn it on and off by voice.
One of the best features is the linear hertz control, in this mode you can set a temp range to stay in and it will adjust the heater output to stay in that range.
Don’t buy one from ACLS, he ripped off Ray (the guy who designed it in Australia) after buying one a couple of months before, and is now selling them as his product.
HTH
Deaks