Most feature complete site monitor Rated 5 out of 5 stars

I've tried all site monitors I came accross:

follow that page
update scanner

Without a doubt sitedelta is the best one. It contains the option of only scanning certain sections of the pages and so it can easily ignore banner swap, irrelevant advertisements etc focusing on changes to content that matters to you.

My only suggestions are to add the capability to ignore number changes and to make the interface more intuitive.

This review is for a previous version of the add-on (0.9a).