Edit: Looks like units capable of dealing with these kinds of power specs run for around $2300 USD, e.g. http://www.gohz.com/2kva-frequency-converter
The inverter cooking is fantastic and makes the oven a lot more useful for serious cooking. I will use 20-40% power for re-heating foods over a longer time and the results are that there are none of the weird molten-hot and still-cold pockets of food. Pre-packaged foods whose directions are, say, "heat for 3 minutes," I will instead heat for 5-6 minutes at 40-50% power and the results are considerably more consistent. Plus, I have found that I can get sous vide-like results at low and long settings. For example, I have discovered that heating a filet mignon cut gently at 10-20%, and periodically halting cooking for a minute to let heat distribute evenly through the cut, and then continuing slowly until it temps at 115°F, and then searing on rocket-hot cast iron produces great results. Better than sous vide, at least for beef tenderloin.
I know I will never go with a non-inverter microwave again as it turns a blunt instrument into a device capable of truly nuanced cooking. If something is going to tie-up counter space, it had better be worth it and the LG is worth it.
The next thing I am looking at is the Anova Precision Combi-Oven. https://anovaculinary.com/anova-precision-oven/
I was wondering also if you know a model that combined variable inverter (not duty-cycle) microwave output, convection, and steam-sensor.
thanks for the info!
In roughly the 140° to 250°F range, the combi ovens are super precise unlike anything else. Nathan Mhyrvold in his tome "Modernist Cuisine" says, (roughly), that the combi oven the single most useful device in a kitchen.
For lower temps, sous vide is more precise but, overall, the combi is more versatile.
Anova, along with Sansaire, was one of the first to introduce affordable sous vide circulators to the market so I have high hopes for their $700 combi.
As for a microwave with a user-visible humidity sensor, I don't know of one but I haven't looked.