Both University Towers and it's neighboring complex, Kingsview Homes, though once off the beatern path, are now prime Fort Greene. When comes to how comfortable a person feels in any given neighborhood and how "safe" it is, I have two suggestions. One is to check the local precinct for crime stats and the other is to go there at different times of day and night and see how you feel. Both these complexes are extremely reasonably priced co-op developments in very close proximity to much more expensive new condos in Downtown Brooklyn and very pricey properties in Fort Greene (bargain!!).
The best suggestion I can give you, however, is to make sure you use a skilled, experienced agent. The sellers all have agents, and you should have a knowledgeable pro on your side to even the playing field. It will save you time, money and aggravation.