I bought this product from Amazon, then went to their web site to purchase DMI and the license to use my iPhone. It works very nicely. I use it as my primary source for contact and calendaring. I do sync with iCal and Address book. I would recommend this for any salesperson who wants to track their activity. I had on issue with iCal, but I was syncing with multiple computers. Support via email was good, and I was able to reset my iCal calendar to re-sync with Daylite.