I use this application to sync my HTC Tytn II with my mac and it is really excellent. It is extremely fast and reliable. So reliable that I prefere to sync Ical and contacts here rather than using Office 2007 on Windows which I dislike. I recommend this product ,most bugs of the beta version have been solved although there is not still desktop mounting of your device in Leopard, everything else works perfectly on mac os X 10.5.1