The NYT had an article recently on tiny apartments (under 400 square feet). While I am kind of intrigued by the tiny house movement, tiny apartments make me shudder. Especially because there didn't seem to be any sort of soundproofing of the walls. Obviously this is a problem in any size apartment, but in a small space you absolutely have nowhere else to go to get away from a noisy neighbor. Plus they want $3000/month for one in NYC.