They have issues almost every day. I like them, but they're not the most reliable company in the world.
They may have issues regularly, but we have had almost zero downtime over the multiple servers we have with them.
Now Vultr on the other hand, single server, multiple outages
We could go on and on with anecdotes, but I think it really comes down to luck whether an outage affects you. If you can't afford downtime occasionally, you should set up a cluster, probably across different providers/locations.