The latest beta, 1.0b6, imported all my Eudora mail OK and is starting to look quite useable, albeit missing some features. I'll now try to use it regularly, with Eudora running in parallel.
I'm still new to IMAP, which I've been forced to use since college changed over. I had around 20 messages in my IMAP Inbox yesterday. But when I looked this morning there were no messages.