Lol, some of the people here act like it is absolutely unthinkable that a Gringo goes to live there. I know a couple of foreigners who live their and they have less robberies than some other gringos I know in Sosua or Puerto Plata.
I lived there for a few months and found it to feel secure, of course it was a top floor apartment with barred (rejas) surrounding the galeria. The people are nice and the hustles are less frequent than Sosua.
The problem is you will find yourself leaving to PP or Sosua for everything but the smallest hardware items or groceries. And forget a restaurant or decent drink out on the town. So you will spend a lot in gas daily getting yourself to a more populous area.
But the people are friendly both Haitian and Dominicans and they do support their neighbors. The downtown park is a good place to sit and strike up a conversation.
A couple things are the very dirty streets and too many friggin' roosters. And that one Dominican neighbor's son who felt putting a 5' speaker atop his car and shaking the neighborhood made him something special - yes it did - a special kind of idiot.
Staying with my sister, now in Oregon for the holidays, it is amazing how quiet the neighborhood is at night - cool & peaceful. (and no bachata !)
But I would not buy in Montellano because of such limited choices.