We went to Kas on 22nd September, and returned on 3rd October and used a2b.com airport transfer - Yesil Dalyan is the operator in Kas. We were a bit worried as it was roughly half-price compared to other airport transfers, but it was ok and not by rusty bicycle or donkey as we half expected! We were picked up by smart shuttle bus at Dalaman airport, transferred to a large comfortable vehicle half-way, with a shuttle-bus for the return to Dalaman airport. So, it was fine. For the return pick-up, you have to ring Yesil Dalyan 48 hours before your pick-up time, its best to get a Turkish person to do it for you. I would use this company again, and they are so reasonably priced.