I used Uber this past January for my annual Lima trip with friends and it was great to have, considering the prices were about what I would pay getting a cab off the street. Probably $3 max to get from the Westin in San Isisdro to get down to larcomar. And with the language barrier you can just enter the destination right on the app.

I think UberPlaya is supposed to be a smaller car, but I noticed all the cars would show up no matter what option you picked (could always pick uberX and would get the same car as if I decided to pay more for the Uber black) Most drivers just had new Corollas or Hyundais.

I wasn't able to get one at the airport, so I got to go through the usual song and dance of getting told 100 soles is "such a good deal" to get into town, and wait til someone bites at 65... but once you're in the city it was never too hard to find a car.