@cristinehoffmann....I have a sink from Create Good Sinks. The “seamless“ drain is merely a gimmick because there IS a seam. It’s just further down into the drain assembly (beneath the rubber disposal gasket). It IS out of sight, but that‘s not a good thing because it collects a TREMENDOUS amount of gunk that just sits there until you remember to remove the gasket and clean it. I would much rather have a visible seam that I can see is dirty and then clean regularly, than have a hidden one that gets super dirty but is out of sight (and out of mind).
Q