You don't find it buggy? For example, right now it claims several of my feeds are 404 and it won't let me fix them -- I have to delete and re-add them.
It's super buggy! Dupes articles and it's happened twice when long reading sessions were lost without any indication of error - the "read" state of tens, maybe hundreds of articles were not updated. I've seen the code on GitHub in the past - it was a ball of pasta.
The "fix a misbehaving feed" dialog claims every URL I give it is 404. And now it has helpfully renamed all my broken feeds to "[Untitled]" so I can't tell them apart in the list.