Usefull but limited, mediocre at best, incomplete iTunes sync
The app is slow and functionality is very limited.
I also find that while it copied all the selected iTunes tracks to the N9, it apparently does not really finish the process. There are tracks that will not show up even after the N9 gets around to refreshing its library, and despite being selectable with a filebrowser they will not play since the "playlist is empty". Whenever I reconnect the phone the app tells me there are "48 tracks to be copied" then apparently proceeds to do so – but they never show.
So while the N9 is truly showing itself as one of the best, if not even THE best phone ever to leave Espoo, this app is pretty much a letdown. Not worthy of the great accomplishment that is the N9.