A nice summary list. With one tiny page style quibble, in the summary table I can't tell, without a lot of cross reference, whether an X-mark or a Check-mark i

A nice summary list. With one tiny page style quibble, in the summary table I can't tell, without a lot of cross reference, whether an X-mark or a Check-mark is the "has this feature" indicator, ((it's the Check-mark)). Probably it would be better just to leave the X-marked column blank.