I am just starting to use more of the features, and they work great. Unfortunately, the Developer Guide is out of date a considerable bit, and I often do not find information that is extremely helpful.
FixedWidth (pg 111) is now FixedColWidth
UseFixedWidth does not seem to exist, though it is referred to.
FitToPage: It would be great to see that this referred to fitting the WIDTH to the page. If I went just by the description, and experience with Excel, I would expect to see the entire grid print on one page. Frustration with a big report got me to try this with excellent results.
HideColumn is also very useful. From the document, I was getting that it was for screen display. It is a fantastic way of printing, too.
Just my 2 cents worth.