no scale or stain needed. I dont use it and I have never had a problem.
It is a great filter for me. No work to the filter with crystal clear water, fits me fine.
I agree it does break down over time, but for the few bucks it costs to save me hassel, its well worth it.
Call me lazy, I call myself busy and no work is the best option for me. I have not used pleated but I dont see the advantage to switch over.