The service attitude was very good. However, the price of the reserved safety seat and the second driver's fee were three times higher than what was requested at the time of pickup. After three flights, I was extremely tired and delayed nearly three hours at the airport. Problems couldn't be solved through international calls, so I was forced to pick up the car. The rental company promised to resolve this after I returned home, but after a month, they are still stalling. When changing the car at Sabiha Gokcen Airport, the staff couldn't speak English, and there was no formal return receipt. I had to struggle to get a handwritten note in the local language. This was still with Avis.