Is there another well known service that does this completely right? (honest ask, not a challenge)
Edit: sounds like there isn't anything in their budget price range that does it well either. Sounds like it should be a goal to provide it, but hard to fault them too hard.
It's fully aimed at power-users though. I'm sure all of my family would be more secure on backblaze because they couldn't set up tarsnap right. For myself though, I use tarsnap.
Currently I only use it to back-up the non-huge parts of my home directory and /etc. This keeps costs reasonable to me.
I know these prices are pretty close to the actual cost of storage, which is amazon S3. I suppose backblaze can do better by handling their own storage.
It's weird that they would go through all this other effort and then have this obvious fail right at the end. Sure, I understand convenience for, say, a web UI or a mobile interface maybe, but it's really odd that they wouldn't have implemented the obvious, client-side-only version first.