I might have considered it on the Allure since it is such an innovative ship. But $150 for a tour on the older ships, such as Monarch and Majesty? No way.
Plus, as diamond members we got a behind the stage tour for free plus a Q&A with the performers from all the production shows. I've been on many bridges and that doesn't fascinate me anymore. Same for the galley. It is just a commercial kitchen. Now, I would like to tour the engineering spaces but that would be it.