I have represented several buyers here and know the buildings very well. Apartments here always trade at a discount relative to other buildings in Clinton HIll, as some people find they aren't as "charming" as the pre-war buildings in the area. As such, I feel they represent a good value in this increasingly-expensive area.
The Clinton Hill Co-ops were built during World War II as housing for officers and enlisted personnel at the nearby Brooklyn Navy Yard. They were converted to rental apartments after the war, and to co-ops in 1982, in what was at the time one of the largest conversions in NYC history. The northernmost buildings were for enlisted personnel, while the five buildings at the southernmost edge of the complex (by Lafayette Ave.) were for officers; apartments here have larger windows, but are otherwise identical to those in the northern part.
The apartments are spacious and the buildings are separated by leafy courtyards and paths. Each building has a laundry and the complex has a full live-in staff of supers and porters. The co-op is in good financial condition, with a sound and growing reserve fund.
Because there are still rental units in the complex, sponsor units occasionally become available (when a rental tenant moves out), meaning no board approval is required. For resales the board approval process is not unduly onerous, especially when you have a real estate agent or broker to do the work for you.
I would be happy to assist you in purchasing an apartment here; do not hesitate to contact me if you would like further information.