Cluster Tabs Needs Help! Rated 2 out of 5 stars
While I appreciate the potential of this add-on, I must say that it has several serious issues that have been reported since first release, but to date have not (to my knowledge) been resolved although updates have been promised. Until these issues are addressed I cannot recommend Cluster Tabs unless one is prepared to live with the problems it creates.
That being said, Cluster Tabs has helped me organize my tabs into meaningful groups. That alone is enough for me to continue struggling with it until (someday?) the developer delivers on their promise to make this add-on