I have the mini and I have mixed feelings about it. What helped me is to realize how dumb the controller was. I got a cheapo thermocouple datalogger from amazon and probed a bunch of locations, at the board, at the built in thermocouple etc. Things that matter: make sure that the built in thermocouple is at the exact same height as the board. Mine was off. Also the amount of liquid inside makes a huuuge difference. Basically you have to do thermal profiling with a known liquid level tweaking the preheat and main heating times and then stick to that exact level.
The liquid quantity has the biggest effect on the main heat ramp rate, if there's too little it heats up way too quickly, if there's too much it will overshoot due to the excess thermal mass.
I have a controlleo toaster oven controller that I plan to retrofit into that, that thing has an adaptive PID controller built into it, maybe with that I could make the thing a bit smarter.
So overall meh, but once figured out it gives nice, consistent results.