Excellent experience for 5 years Over the past 5 years I've had two different servers at Hetzner, since I upgraded to one with better hardware around 2 years ago. So I've been through the order process twice and both times the server was ready in around 15-20 minutes, despite one of the orders being at around 11 PM at the data center in Germany!
I've been on the phone with customer service once (about 1 minute response time) and on the e-mail a several times over the years. Every time it has been a very pleasant experience with accurate and useful replies, and a short response time.
For example ordering an additional IP for a VM took just 15 minutes to go through, and when I had a HDD failure in a RAID it was replaced about 30 minutes later.
The admin interface does what it needs to do, nothing fancy but functionality is perfect. After all you're renting a dedicated server so all you really do in the panel is usually install whichever distro you fancy and rarely ever visit the panel again, but it does much more than that and it is easy to navigate and find what you need.
There has never been any server crashes, the server have only been down whenever I've restarted it. So zero power-outs/hardware fails (except the HDD which is what happens.)
With regards to (network) downtime I haven't experienced any, but I don't keep track of it either so there could have been a tiny bit downtime.
Hetzner made some upgrades to their network infrastructure a while ago and it only caused a bit more than 5 minutes downtime.
I received an e-mail 3 or 4 weeks in advance with very clear information about what would take place, at what time, the expected downtime etc.
It has happened that I've received a new credit card and forgot to update the payment details in the control panel, however I just received a kind e-mail from Hetzner informing me about the failed transaction and I was asked to update the payment details in the control panel.
It is difficult, if not impossible, to find another host out there that can match the prices of Hetzner, and considering their excellent products, customer service and response times it is an absolute steal getting a server at Hetzner.
I'm rarely this impressed with quality at what is literally a discount price.