This apparently bona fide company (SUN RENT-A-CAR)has an office at Istanbul International Airport. Myself and my husband, both OAPs, paid 50 euros for a return car transfer from the airport to our hotel in Istanbul. We were given a receipt and a business card with their phone, fax number, and e-mail address. It all looked very convincing.The outward journey, although driven in a hair-raising fashion by a man who spent the whole journey on his mobile phone,in a car without seat belts, was accomplished. However the arranged return pickup did not materialise, despite 3 phone calls from us and 2 from our hotel receptionist. The excuses ranged from " bad traffic" ( in fact it was a Sunday and the traffic was very light) to " the driver is not sure where your hotel is" (despite the fact that he'd taken us there four days previously!) In the end our hotel managed to arrange alternative transport and we caught our flight home, but only just. I know it wasn't a great deal of money but it was a worrying and frustrating experience for us and I don't want other people to suffer from the same scam. The hotel receptionist said that he had dealt with the same problem with this firm on several previous occasions so I urge everyone to avoid this outfit like the plague!