As far as stability is concerned, I don’t dislike it. It’s been just about as stable as iOS 12 always was for me, which is to say generally fine minus the bug and/or crash every now and then. I do wish Homekit and the Home app were more stable and didn’t give me the dreaded No Response at least once a day.
However iOS 13/iPad OS are still missing a lot of things for me. Namely I wish iPadOS had all the missing iPhone apps, finally. I wish they made the TV app work so that any live streams a user gets through their service provider (like Sling or Fubo) is watchable directly in the TV app itself. And then there are some little things I’d like, such as nearby iOS devices showing up in the Now Playing section of Control Center, so I can control what I’m listening to on my iPhone with headphones from my iPad and vice versa, having every device show up in the Battery widget, timers and alarms going off everywhere, etc.