I've only had 1 HDD failure since 2013 which their support was quick to resolve. I haven't noticed any network interruptions myself personally during that time.

I've only had them for a few years but I've yet to experience any issues with their great value (e.g 2TB €9.90 /mo) storage box servers. https://www.hetzner.com/storage/storage-box

Only issue I have with them is the latency of their Germany DC's from the US, if they end up offering dedicated servers in a US DC I'll be moving over my existing Hetzner and AWS (non RDS linked) App servers over.