Went on the same tour a few weeks ago. I loved it.
Beyond the aesthetic there are a number of other great intentions behind the project: a pedestrianised mixed-use estate, hiding cars underneath and at the edges. It's high density, high public space. Urban allotments, private residents' gardens. Given the location, much of it is incredibly quiet!
There actually were plans to have shops on the estate, but the footfall was too low for them to survive as it's not intuitive to walk through. Having a self-contained estate is a great goal, but that element at least didn't work.
Though i do have huge sympathy for Brutalism anyway. Joanathan Meades gives an entertaining defence, whether you end up agreeing or not vimeo.com/93963469
If I had the money I'd definitely consider it.