CarMax offers a generally positive experience for customers looking to buy or sell vehicles. Many reviews highlight the helpful, understanding, and patient staff, especially at the Murfreesboro location. Customers appreciate the fast and friendly service, with several noting that the purchasing process is mostly seamless. However, there are some areas for improvement. A few customers experienced communication issues between online services and the store, leading to confusion during the buying process. Additionally, some reviewers expressed concerns about the lack of knowledge from salespeople regarding the vehicles, which could hinder the overall experience. There was also a mention of a frustrating situation involving key fobs, where one customer had to pay for an additional key after purchasing a new vehicle. Despite these challenges, many customers still recommend CarMax for its clean atmosphere and professional staff. Overall, CarMax is seen as a reliable option for purchasing and selling cars, with a strong likelihood of repeat business from satisfied customers.