Could be useful depending on your needs,
Storj has been working with Filezilla the past 8 months on developing an integration for their FTP platform which would bring 15 million users into the fold.

This is currently in beta testing and is unknown when it will be completed

As for current storage 25gb is free for 12 months I think is plenty for general needs.
Currently it doesn't provide the function to allow others to access your files, if that's your need.

Yes failure is always a possibility is the same with data storage is much less with crypto data storage solutions.
Extra security is provided with a decentralized model and risk is mitigated with Storj though their distributed node storage as opposed to central data centers with a single point of failure, one falling to an attack or catastrophe all data could be lost.