I've been using it in prod for almost 10 years now, almost without issues. Personally I'm still a very happy customer. FWIW, it's a low-traffic app, so cost isn't an issue. I'm happy to pay Heroku a bit more for the developer ergonomics over running my own server – it has saved me a ton of time.
Luckily I was not affected by the recent "issues", since I'm not using the Github integration.
Luckily I was not affected by the recent "issues", since I'm not using the Github integration.