We use all threee: Commvault SQL Agent, LightSpeed and SQL Native Backups (with compression). An issue w/Commvault COULD be the backups are scheduled and may not run when you want them to because of library resources, etc. We really prefer to backup SQL to disk then sweep the disk with the Commvault Filesystem Agent. That way we have backup data available on local server disk when we need it and do not have to pay for the Commvault SQL Agent. Commvault does work it's just a personal preference as the DBA we have more control (yes DBA's are control freaks).