It took ages to get from one feed to a target feed so I was forced to use the track pad, something I try to avoid. That said, previous versions were impossible to navigate with just the keyboard because the app refreshed the display of every feed as you went up/down the list, even though the content itself was not refreshed. The only reason I stuck with it is that there is nothing else that even comes close to its (poorly implemented) functionality. I've been using this app for a few years now and I have to say, up until this latest version, it has been the buggiest, most unresponsive app I have ever used.
This rating only applies to Vienna3.1.4, which finally got it right.
