Great software for Mac and iPhone.
My log book was out of date since 2004. But I had 3 different excel spreadsheets I had used for tracking legalities and my version of a logbook. Log10Pro imported all my spreadsheets with no problem. It also imported the last two years of my flying from my company's scheduling software. I had only to input manually a year and a half. I was able to document over 5000 hours in less than three weeks.
The import feature is very good. It works with lots of different scheduling software. Just import your schedule into the software sync to the iphone, great.
I had originally looked at this software a year and a half ago (when it was much cheaper) but it was really limited. Now the improvements are really worth paying for.