Thank you, yes, I have carried out an online search on Hungarikana/Arcanum. I am now looking for additional information beyond those, such as resident lists and the like (which I'd expect to find in a city archive).
That was the motivation for my question about experience with that archive.

Besides that, your response is interesting with regard to the comment on "Some of it can be accessed only locally." - can you please elaborate? Examples of material that is only available for walk-in research?

Thank you - Yaron