Summary: After the warranty expired on this camera, the zoom started to malfunction. It would zoom in and out by itself. The camera became useless. I googled the problem and found it's widespread. It's also a problem with the HF10. Canon wanted more than $200 to fix it. The camera should be recalled. I will never buy Canon again.
Summary: I have owned the HF100 for a little over two years now (since mid-2008). The picture quality is superb, the features are terrific, the sound is very good. And then it breaks. And breaks again. Out of the box it worked like a charm. The quality of the output far exceeded my expectations, particularly in full-HD on a 50" 1080P plasma.