Been twice. Once for a wedding and once for a couple holiday.
Stayed in Playa Dorada the firat time, it was like an enclosed hotel complex and they didn't recommend that you went out and about. We did, and were fine, one local guide there told us the locals on the island will never need to beg because of the amount of fruit and veg that grows naturally on the land. Did bodyboarding, jeep safari etc, all great fun.
The wedding was at dream punta cana, again a nice hotel but didn't get out much that time.
Both AI and was OK, drinks were served in both places in only plastic small cups though, which was a bit odd at the bar, been to better, and if you don't get out of the resort you end up feeling like you could be anywhere.
At both places the beaches kind of had reserved areas for the hotel, and it's supposed to be guarded. Walk to the end of that stretch and there is a sign saying you're leaving the resort's land and any further is at your own risk.
Regardless, was always a number of beach sellers hawking dvds, weed, hairstyling, genuine fake Rolex's etc making their way up and down, but didn't see actual begging - it's a poor place outside of the resort, but from what we saw the people were very proud to be Dominican and not at all downbeat. Possibly different now, that was almost a decade ago when we last went.