They are really fast in adding them. The documentation is very well written and complete. I have had occasion to strip all of the HTML tags out of a file. Homesite allows Regular Expressions, which makes this a breeze. It is possible to compare two pages, with the results showing the number of words in both sites.
Many options are available, including the ability to include metatags or comments.
Use it to compare your site with a competitors, and beat them in the SE rankings.