I'm on DO and on Fly, planning to try out Hetzner.
Fly gave me plenty of downtime. "Network connectivity issues".
I'm with them only because of laziness.
The setup was more complicated than a standard setup because of the abstractions and corner cases and lack of examples in my language.
Logging is bad,you can't easily SSH in the machine and inspect things.
Next time I'll setup a more powerful server I'll move all my apps there.