If you look like you're unfamiliar with pesos or are in a rush to get into a taxi to leave the airport, you're more likely to be ripped off when you pay for the taxi to your hotel. A man will catch your attention and lead you to a girl in a booth to purchase a ticket (prices clearly dictated by zone) and she will quickly and deftly provide you with change that appears to be sufficient even though she has short changed you. I didn't look at my change until we were well on our way to the hotel...and then realized that I was short changed 100 pesos. Not the best welcome to PV but the girls in the booth count on the fact that tourists won't ever notice. Take an extra minute to check your change while you're still at the booth.