Whilst in development, Cewkies ran this on a PvE server we co-own together. It was designed with player building in mind, and built partially from player feedback as to what kind of things they enjoy. Players loved building on it, especially the centrepiece rocks. The cave is buildable and even has a waterfall inside it, which legacy gamers may appreciate. I was involved in the testing of this monument and also watched him creating it from scratch. Would easily say more than 50 hours of development time have been put into this monument alone, with hundreds of hours in the map he plans on releasing here soon.