I just returned from 16 days in the DR. I found this guide untrustworthy and wrong. I spent the first 3 days hiking Pico Duarte and then was based for 2 weeks in Santiago. To give you an idea of the level of error, the map of Santiago on p. 264 shows the Centro Leon in one place, the description on p. 269 gives another location: neither one is correct. Now, my travels were off the beaten tourist path--I only spent 4 hours at a beach. But that's why I chose the Rough Guide. In general the guide was written for travellers who rent cars, but everyone (including the guide) recommended against them. Guaguas are great!
Here are the errors in the order I encountered them:
p. 281 The Finca Altagracia does not accept overnight guests except on a long term stay. If you do manage to get a motoconcho to take you on the mountain road to get at their gates at night, they will not let you in and you will have to go to any farmhouse in a nearby village that's big and kind enough to take you in. The next morning they will tell you that they have been meaning to tell the guide that they got it wrong.
p. 287 Duarte's face is not sculpted onto the rocks. Clearly the writer or editor has never been to the summit of Pico Duarte.
p. 274 There *may* have been mines down the road leading to "La Cumbre de Juan Vegas", but the locals do not know of them, and my hour's hike to the end of the path did not find them. Currently there are mines off of a road about 3-4 kilometers further North. The turn is to the EAST right after the police station. Ask a motoconcho to take you to the mines. They are about 1 kilometer down the road, but hard to find on your own.
p. 269 The Centro de Recreo and the Palacio Consistorial are NOT on the North side of the park--on the west side.
p. 269-70 The Centro de Cultura is not where they say it is either.
p. 277 The Charcos de Los Indios is criminally overrated. I moved heaven and earth to find it, asking many locals and spending a whole day. The locals did say it is better when the waterfalls have more water, but the prose in this section should be toned down. I can send pictures of the place.
That's all I have time for now.