Rated 2 out of 5 stars

This add-on has given me good service for years and previously would have merited a score of five stars. But the latest revision has made many of the buttons difficult for me to understand and easy to confuse, one with another. I have tried for almost a fortnight to get used to the new designs but they just do not work for me. Therefore I suggest that intending users should look at the developer's site before committing to this extension, or use it on a trial basis and see how it feels to them.
I am amazed that apparently unfavourable reviews can be deleted at the developer's request. I will have to bear this in mind in future when using this site.

This review is for a previous version of the add-on (1.0.1-signed.1-signed). 

It is not just unfavourable reviews, it has nothing to do with the rating of the review actually, that can be deleted. I can flag any review that I have an issue with for moderation, then an editor gets to decide if going by their guidelines that review should stay or not. Other reviews that I have deleted lots of are of the type "can you add button x" many of which are 5 star reviews. They are just not really that relevant.