There's no need to say that the results were negative. Brasilia is known for being unfriendly to its dwellers. Some have called it "the soulless city," others have called it the "fantasy island." It's also called the "monumental city," many times pejoratively ("people don't enjoy living and working inside monuments" is a commonly heard complaint in Brasilia). I personally find Brasilia's monuments to vary in appearance from plain ugly to nightmarish.
As time goes, the city looks to me more and more like the ideal location for a postwar fascistic dystopia. Economist Marcos Bittencourt for example recently wrote a very good article (in Portuguese) that explains the many failures of Brasilia as a livable city. It's a personal judgment naturally, but I've been to only one city that is uglier and less urban friendly than Brasilia, and this city is São Paulo - and I've been to many places. Economist Tyler Cowen has been recently to Brasilia and summarized well how it looks like to an outsider:
Could this be the strangest city I have visited? ... It resembles an old science fiction movie and yes I like old science fiction movies.Cowen hits the bull's-eye: Brasilia looks and feels exactly like a sixties sci-fi z-movie, and ages as badly as sci-fi z-movies from the sixties do. In reality, I've always wondered why is it that very few people have realized that one of the most well-known backdrop drawings in the Star Trek explicitly paid homage to Brasilia. Compare the two pictures below: