I find Finn's idea basically cool and innovative. But it also bothers me that Finn has replaced the normal search. I also think it would be better if Finn were an extra icon or widget or something. From a UX point of view, I find it irritating that a search field opens a bot. When I click in a search field, I do not expect a dialogue with a bot, but a normal search.
What really bothers me about Finn at the moment is how slow the bot is. The normal search was worlds faster. I could probably live with Finn as a replacement for the search, but Finn then has to become much faster. I am aware that this is a beta. Hence the feedback. One of the biggest priorities should be to drastically improve the speed of the bot.