RSS support has improved markedly in the 5 series. It generated serious crashers in the 4 series. That said there are still certain RSS feeds that don't work. But I did report a fair number of bugs in it an most of them (all the important ones) were fixed.
What's far worse for me is its crummy performance and the amount of clicking needed to make it work. I would switch away to an app designed for this except I can't live without:
- Ad Blocking
- Tabs
- Bookmarks
I think the current implementation is an interesting idea and has some features worth keeping but overall I consider it lame, or perhaps I should say, still unfinished.
But despite all that I use it every day.