It is worth it. We have to comply with HIPAA and SOX data requirements and are very sensitive about the handling of data. So this is a necessary service for a company like mine.
Absolutely this is a paid engagement with EMC PS. I'm pretty sure they offer different levels of erasure as well (different number of cycles through the process).
PS or CE will come out onsite with a secure erasure kit. It's a laptop connected to SPs ..where they PXE boot SPs and run multiple passes erasing the drives. We don’t' have to return our arrays so we shred our drives.