We have put up a test forum and so far my mods and users are loving it. There are SO MANY neat touches, that you only fully appreciate when you install it and get some of your users and mods onboard to have a play. The refreshingly smooth moderation is an unexpected bonus too.
So far there is only one major issue for us, but I am hoping this will be addressed by the team soon.
I will try to keep this thread updated with my thoughts... feel free to add your own too!