It's a great system and I've known people to have great experiences with it. But there are aspects including upload delays and auto data deletion that that be cause for concern enough for some to find another backup or archive method.

It uploads very fast. I just don't know if there is anything comparable. I've tried iDrive and the upload looks like it will take weeks when Backblaze already uploaded. And I love that they will send you a drive of all your files very quickly if yours crashes. This has happened before and it was a life saver for our project. It is easy to setup and use.

I don't love the online interface. And most of all, I was having issues with the app saying the backups were up to date but the cloud not showing them yet (but I've heard there could be an 8 hour delay or more). And I also have the issue of the drives not being seen by Backblaze. You have to make sure to plug them in - maybe even dismount and remount for it to see them. And I don't like that it will delete your data if you don't mount the drive for it every 30 days.