I chose Tamra out of three rental companies because the reviews mentioned Chinese service. However, the so-called Chinese service is just adding a WeChat account in Chinese to ask questions directly. There are no staff members who speak Chinese at the store; communication is all in Korean or English, so it's manageable if your English is decent. The WeChat staff had a poor attitude and responded very slowly, providing no real help and significantly affecting my travel experience. I won't choose Tamra again. Driving around Jeju Island is very convenient and easy. Except for the city center, which has more traffic, other areas are not crowded and are great for driving.