It had been required reading when I was in college, but I found it hadn't aged very well on a second reading. Hall tried to make his case against urban overcrowding, citing the "behavioral sinks" that were being created in the 1960's. He presented numerous examples, starting with mice, that showed the debilitating effects overcrowding has on animals, and applied this to the overpopulated urban environments.
More interesting was the study he did on the way persons from different culture perceive space, drawing from American, European, Arab and Asian societies. Even between Americans and English the differences were startling, but it seemed to me that he made too much of these differences, that affluence has as much a role in shaping the way people perceive space as does culture, which Hall did not touch upon.
Hall was pessimistic of the modern cities in America, noting that the race riots, in his mind, resulted from the cultural differences between Whites, Blacks and Hispanics. I think it had more to do with social inequalities than it did race, but Hall seemed convinced there are inherit differences between the races that could not be overcome, which I found to be too deterministic.