We run a SaaS business there on ~25 servers with Hetzner. Besides small issues we are pretty happy. Feel free to email me if you want to know more details.
Funnily I saw a thread on the customers forum at forum.hetzner.de today about why Hetzner does not have a better reputation social-media wise. Seems not to be on their priority list. There is even an English subforum, you may try to register there and ask for experience by other customers.