I have used the transfer services some days ago. I was surprise because the driver is more than professional compared to a simple transfer. He waited in the airport more then a hour due to the delay of my flight. He speak english very well and during the transfer I had the opportunity to know new information about life in Ukraina and its historical places. In the transfer back to airport the driver was punctual at the pick up. If I have to use the service again, sure I will call Calltaxi Taxi service again. I have to add that the care of the service was good from the first message with WhatsApp to the last transfer back to the airport.
He speaks english very well.
Lviv - Ivano-Frankivsk