I've used this product for several months and if you want to know how easy it is to use, try iPhoto... it's easier than that and I didn't think it could get much easier than iPhoto!
When you buy the product, there is very little documentation that is needed. Like many Apple applications, it is very intuitive. Installation is as close to one-step as you can get with an OS X app. Use is, as I've said, intuitive. You don't have to know digital radiography to acquire and manipulate images. All you have to do is click buttons on the interface. It even knows which patient the image belongs to (as long as you know), so it can't be stored in the wrong place. So what little documentation there is comes with the installation disk.

If you need support, you can arrange paid support through aMac DR directly. How better than direct from the "horse's mouth"?

I don't know of another digital radiography program, Mac- or Windows-based, that offers all the features of this product. They keep adding tools as they update the program and this is an incredible "hidden" benefit of this software.

Price: I'm a dental practice management consultant and when I do a return on investment analysis for my clients, the typical ROI of about 1 year is always met with very pleasant surprise, so don't let the basic kit cost of $12,000 discourage you. The hardware has a 2-year warranty, not the usual 1 year of other manufacturers. Worth a lot when you look at the cost of warranty extension programs!