Can't import iCal or Mail/accounts, the import of *.mbox should be possible but does not work. All incoming e mails are classified as SPAM, regardless of the content. So you have to sort out the "good" e mails by hand (not easy if you have 5 accounts and hundreds of e mails in Summit's quarantine folder. (By the way: selecting items needs getting used to...) All in all the application is clumsy and very slow and opens in full-screen-view every time I start it. The preferences are very rudimental. It is a mystery to me how they can ask for money for such a half-baked piece of software.