I've used it for a couple of years. The system had a rich and powerful user management model and very useful internal search capabilities. The templating approach was a bit clunky and the built-in "components" were frustratingly limited at times. The editor was a complete disaster and Serena's development/support of the product became almost tragic toward the end of our use of the product. We've since migrated to Hannon Hill's Cascade Server and we're quite pleased so far. If you're finding yourself saddled with this system and have some questions, there's a higher-ed-oriented Yahoo group dedicated to Collage. Best of luck.