No. Bella Vista Sur is good, Bella Vista Norte is not good, some barrios there.
Unlike Colombia, Panama and other countries, there are no 100% good areas in SD. You can see nice clean street with new towers, and ugly unfinished construction that will stay unfinished forever and some ugly old houses or even a barrio just a few feet from those luxury towers. Even in Naco and Piantini we have some ugly trash.
And don't forget that even in the luxury building your neighbors can be some imbeciles with loud bachata and other unpleasant things. Rich people doesn't mean normal people in DR.
Go around the area personally, find the street that you like, the place that you like, and if you are lucky maybe that building will have good administration and nice neighbors....