Moving to Blackheth

[DNA77]

Hello
we are a family considering to move to Blackheath for its outstanding schools. I would very much appreciate any advice with regards to the area St Josephs Vale, is it safe to live? any crimes or social disadvantages there? is £400,000 prices for 2 bedrooms flat is standard for that area? cheap? expensive? or does it indicate a problem or deficit in the property?