Rated 5 out of 5 stars
Very useful in deleting unneeded HTML-formatted text to keep the emails small in size. For example if you receive an email in HTML but don't really need to keep the HTML-ness of it, you can use this add-on to delete the HTML part of the email and retain the text-only part. This can help reduce the size of the email potentially by 50%, if you're storing tons of such email like me.
The only gripe is: after removing the HTML parts of an email, the email is listed as having an attachment although the original email didn't really have an attachment (like attached word docs, images, pdfs). This kinda messes up the "search for all emails with attachments".