My wife and I booked with Prague Airport Transfers from the UK just before our flight to Prague. Very simple and easy to use, site was absolutely clear it was a fixed price.
Roman the driver was waiting for us as we cleared customs, with our name on a board which helped us find him and made us feel welcomed, he was very professional in a suit. Roman welcomed us to Prague, then it was a short walk to taxi, which was a new Skoda Superb so all good, not some old banger. Free water, map and tour voucher as advertised on the site.
As part of the airport transfer booking we recieved a free 4 hour tour of the city, no catches it was completely free. My wife and I met up with our tour guide Ross today, although I hadn't brought the voucher the office had contacted him to let him know this after I'd sent an email advising I'd misplaced it, great service again.
There were 60+ in the group, this presented no problem for him, he managed to keep us all together. Ross was very knowledgeable and certainly enlightened my wife and I on the history of Prague and his country over the centuries. He was polite and professional at all times and it was an absolute pleasure staying on both halves of the tour. Many thanks to Ross and Roman the driver for the excellent service.