I like it for the most part, but the UI is really quite poor.
(1) Toolbar layout is really non sensical, with first two icons dedicated to finding more forums to add. It should be just "Forums" (with "+" button at the top for discovering and adding more forums) and "Settings".
(2) When you are inside one of the forums, you must click "latest" icon then "Main Menu" button at the top to navigate back to list of forums I subscribe to. "Forums" should be the first icon on the toolbar.
(3) On the message view, "more" button reveals 3 options: Refresh, Subscribe, and More. Guess what More option reveals: Share and Open in Safari. The initial list can easily accommodate Refresh, Subscribe, Share, and Open in Safari. (Instapaper support would be useful as well.)
These are just three of many bizarre UI choices.
That said, Tapatalk is universal and provides better experience overall. I really wish the developer would add support for more UBB tags, such as spoilers, however.