Overall, its good to see an Trello mac app. Waited for this long time
I'm glad that more people can have the Paws experience for free, I've been using Paws since last July and it's been a great experience.
Understandable that offline usage is probably on feature backlog and not yet implemented as this needs complex sync management. But until then this not much more then a browser substitute. If you are on the road often and try to work with Trello this is painful. Internet on the road (eg trains & flights) is never stable and Trello is very sensitive with connection.