Overall, it was relatively smooth.

Avoid this car rental company!!! They force you to buy insurance!! When we picked up the car, the staff kept pushing for full insurance despite our clear refusals. The road from Kayseri to Goreme is in good condition. Even after we declined the full insurance, our credit card was still charged 1123.68 lira without our consent. The car rental company recorded our credit card details manually without using a POS machine (which is very concerning). Only after we left did we notice the charge. We later found out it was for the forced full insurance.
When returning the car, there were no staff members in the parking lot. No one answered the phone either. After waiting for some time, they came only when other customers arrived to rent cars.

There is still insurance promotion, just say 'No' if you don't want it.

During the rental period, our tires were slashed, so we went to the nearest Avis. However, since the insurance was purchased from QEEQ and not Avis, it took three and a half hours to address the issue, and we ended up fixing the car ourselves. The process was highly inefficient, and we had to communicate with the car rental company in Turkish, which was quite challenging. Besides that, everything else was alright.

The process was smooth, but the refund wasn't very straightforward.