Iberostate is a large complex, a development extension of Iberostar Resort. I don't know first hand about their specific management, but in general the complexes managed by/and like a resort have high maintenance fees and are geared toward investment rentals. Many have their own rental system which you can place your unit into. The smaller complexes, (I own in one in el Cortecito), have their own management and are usually governed by a Board of fellow owners... this can be a good thing or a very bad thing. We are fortunate, but I've heard horror stories from friends who own in neighboring complexes.
When shopping, we considered a couple of apartments in Cocotal, but quickly eliminated them for the very reasons Mike mentions.. we are beach people. As an aside, one of our owners became dissatisfied with the neighbors, (unwarranted.. but whatever)... and swapped his unit in our complex on an even trade for a slightly larger unit in Cocotal. I don't know which area, though.
One comment about real estate listings.... even the most respected and highly regarded agencies have some "fuzzy" data in their listings. Don't rely completely on the details of the what you read. You MUST go and inspect the individual properties for yourself. A couple of times at differing times of day if possible.
Punta Cana Village is probably the best large, self contained property, with most if not all amenities there on site. It is also a large and varied property. There are members here who live there and can better comment on the details.
Thanks