Every apartment or condo I’ve lived in in the US (and it’s been at least 10) has had terrible problems with noise from neighbor units, except 2, and one of those was the top floor. The other was actually a concrete high-rise built as condos so I suspect that solid construction helped. Voices, TV, footsteps, sex, arguments, domestic violence, parties, demo/remodeling, noisy pets; you name it, I’ve heard it in excruciating detail. It’s not been my experience that “niceness” of the building makes any difference either, just height, as wood frame construction becomes impractical over a certain number of stories—but that’s getting higher every few years.

I understand there are construction techniques to mitigate this even in low-rise wood frame buildings, but I’ll eat my hat if any designer or builder in the US bothers unless forced by regulation.