The technical support at Loadbalancer.org is possibly one of the best that I have had to deal with and it is 24/7, too.
LoadBalancer Enterprise simplifies test environment setups, transitions smoothly to production without DNS changes, and efficiently balances intranet sites to ensure server failover and continuous access. It handles high traffic with reduced latency and offers SSL Layer 7 balancing and traffic routing. Praised for scalability and ease of migration, it needs better configuration ease, scalability cost management, and stability. Automated FTP backups and graphing data access are beneficial, but lacks bonding capability.