La Vida FasZIHnante

New rates were posted today for the Transporte Terrestre aka airport taxis. Some rates went down, but most went up. While considered expensive by many, they provide an excellent service and used late model vehicles. Personally I wouldn't hesitate to use their service.
Airport Ground Transportation Services in Zihuatanejo-Ixtapa

Another alternative is to walk outside the airport and catch the combi to Centro Zihuatanejo. (Another combi goes to Barra de Potosi if that is where you are staying.) The culture is such that upon entering or exiting a combi, greetings are exchanged. You can then sometimes strike up a conversation with the locals. The cost is currently $15 pesos.

On my first trip to Zihuatanejo in 2016, I was scanning the prices for Transporte Terrestre upon arriving at the airport. In my halting Spanish, I asked a security guard if there was an autobus or other form of transportation downtown. She said, "Oh, no, Sir. This is the only way to get downtown."

I looked at her, smiled, and said, "Are you sure? I don't think the employees here at the airport are paying this much to get to and from work."

She blushed and said, "There is a combi outside the airport. Just walk across the parking lot."

Of course, you will have to decide if want to ride in a mini-bus in the midst of a pandemic. Pinche Covid!