You can't learn what an apartment is like from a listing. You learn it the first time the hot water runs out mid-shower. You learn it when a "quick fix" from the super takes three weeks, or when the mice show up the first cold night in November.
That knowledge lives in people. Tenants who stayed three winters. Renters who fought for a security deposit. Neighbors who know which super picks up the phone.
ThinWalls exists to put that knowledge in one place, in their own words.