I want to share a positive experience I had with Uber while in POP just a few weeks ago. My trip from Costambar to the colonial area of Puerto Plata ran me 550 Pesos due to the lockdown of business by the taxi mafia there. When I returned I ordered a ride with Uber, and I only paid 154 pesos to return. The driver told me that he can drop off in Costambar, but can not pick up passengers due to the taxi mafia's stronghold. The driver was friendly and the fare was more than reasonable. The difference of 400 Pesos is absolutely ridiculous. I am posting this to illustrate the tremendous difference in price, and hopefully others will use Uber and save some cash while on vacation or otherwise.
Just to clarify, as far as I've seen, this price difference is no specific to Uber, only to these "taxi-mafias". That is to say, that if you ask a regular taxi to pick you up leaving any resort, they will charge you this exact same 150 DOP per service. It's only if you leave from inside a resort, that these outrageous prices are charged.
Once, years ago, we were dining in Playa Dorada and were about to return home (POP). I asked that taxi waiting in front of the building how much for the city center - about that 550 pesos... I told him forget it, called another taxi in front of him, we walked to the gates and our taxi was already waiting there - 150 pesos and the first taxi we left fuming from anger and shouting some very nice Spanish... We went safely and quickly back home with a regular taxi...
On another occasion, I grabbed a taxi alone in the city center and told the driver where to go. He asked me if I'll pay in USD or in DOP. I answered in DOP and then asked him, why do you ask and how much would it cost if I were to pay in USD. He told me quite honestly that he/they have different pricing for DOP and USD, the USD price being multiple that of DOP...