This service is operated by licensed taxi companies within la Habana, like Panataxi or Cubataxi. Taxi reservation in la Habana Airport is strongly reccomended in order to avoid scams and traps perpretated by illegal taxi drivers to unaware turists.
The service is always AVAILABLE; it is necessary to complete on-line pre-payment, in order to have the reservation confirmed. Once paid, a voucher will be sent to your mailbox: print it and bring it to Cuba. A taxi driver with a sign with your name on will be waiting for your arrival. Be sure he has the same reservation number, in order not to be deceived by some illegal taxi driver.