We have just returned from Krakow. We arranged airport transfers and a visit to Auschwitz-Birkenau. The drivers were punctual or early, polite and very professional. I had to change the booking twice due to accommodation changes by booking.com. However the customer services manager (Mariana) was very patient and forwarded the new confirmation very quickly. A great service and I will recommend you to anyone visiting Krakow in the future. Thank you.