Distributed locks are essential for maintaining order and fairness in high-demand distributed systems, such as online ticket sales, where multiple users may attempt to purchase the same item simultaneously. Traditional methods like Paxos, Raft, and Apache Zookeeper, while effective, can be complex to set up and manage. In response, Amazon's DynamoDB Lock Client offers a simplified solution, and Momento has developed a cost-effective alternative that integrates seamlessly with existing systems and reduces expenses by 50-90% depending on the workload. Momento's locking library emphasizes ease of integration and management, ensuring a smooth user experience by maintaining continuous locks during transactions through heartbeating, crucial for preventing issues like double bookings. While optimistic concurrency control might seem appealing, its limitations in high-traffic environments make pessimistic locking a more reliable choice, ensuring user trust and satisfaction. Momento's approach offers significant advantages such as cost-effectiveness, high performance, and reduced infrastructure management, making it an ideal choice for systems requiring robust distributed lock management.