@Craig, small correction: KDB (Kaseya Data Backup) uses our own Kaseya technology and leverages Amazon S3 for online storage or your own network based storage for local storage.
It is KSBR (Kaseya System Backup & Restore) that uses StorageCraft engine.
@NickT, check www.kaseya.com/.../system-backup-restore.aspx for details on KSBR. I'd suggest you talk to your Account Manager as they'll be able to advise the best product for your needs.
Regards,
Amado Hidalgo, Kaseya Support