This report presents a comprehensive analysis of car insurance brokerage services based on a sample of 400 customers. It addresses questions raised by Paul Anderson, examining customer savings, broker performance, satisfaction levels, and the relationship between insurance premiums and various factors. The analysis reveals key findings, including the median savings, performance comparisons between insurance brokers, drivers of customer satisfaction, and the impact of car value on insurance premiums. The report also estimates the range of mean savings for all customers, the proportion of customers worse off with brokers, and compares current savings with historical data. Furthermore, it assesses the claim about the proportion of males using broker services and determines the required sample size for future studies. The analysis concludes with a summary of the key findings and implications for car insurance brokerage services, offering a data-driven perspective on customer experiences and the effectiveness of brokerage services.