This. I switched to stainless. No aluminum or rancid oil, both of which I think negatively affect flavor. I even pour my La Croix into a glass because I don’t like the taste of the can. Maybe I’m just sensitive but I love a clean moka pot. I have at least one moka everyday.
Moka is definitely a very robust brew. If you find you’re getting bitterness, try tweaking your extraction with a larger grind size, higher temp (thus faster brew time), or both.