I used that for a while as well. It isn't a bad logbook, but to me it had it's downsides. First off, you can export your logbook and keep you own backups but you have to do it while you have an active account. The real turn off for me though was the iPhone app. It was easy to use and it did sync automatically, but it requires an active internet connection to enter ANY data. This means that you can't update your logbook at cruise, you have to wait till you're on the ground which is when I'm typically most busy. It also doesn't have any sort of import function for pairings so you have to build every flight manually which gets a bit tedious on the iPhone.