We use it all the time, there is no scale in the kettle, from the word at all. I hope that they indicate the actual dates of filter replacement, otherwise the replacement date is set in hindsight.
It's good that you can pay in cash and through the pay application; which always works; an excellent solution for those who do not have water filters and at the same time a kettle without precipitation and scale; the main thing and I hope they do honestly is monthly filter replacement, what else is needed; being near the house and in the neighborhood of the block.
We also believe in further honest work.
There are no disadvantages.