That's a cheap shot, it's been as reliable as the underlying fabric, the only thing that really stood out for me is how utterly weird HN is when it comes to determining what constitutes reliability: no data was lost other than a tiny bit that was in inbound transit which can still be recovered (and which you could not realistically protect against). Note that this is a backup service and not something that is normally found in your primary business processes. As such if it stores the crown jewels safely, allows for them to be restored if and when needed and doesn't leak them in the meantime that's mission accomplished.
> or cost effective.
That depends on your use case, and not everything is about cost. The way it is set up I think the trust factor that even Colin can't read your data and that there will always be a way to get your data back out if you should need it is what matters. Backups that don't work are a net negative, a backup that does work can be, given the right circumstances, absolutely priceless.
