The ease of use, integration into other platforms to access records in one place is great! We are so far ahead with our record retention requirements because we have had issues storing documents that were not properly reviewed by an attorney or legal department before they left my office (in some cases).
I wish there was more storage available as well but this does solve most problems for us now - especially if you combine it with cloud backup services like Dropbox Inc's products which gives them another revenue stream from customers who want their files protected without having those devices at home all day long.