I like the ability to have multiple users from different companies share a single room. It's easy to keep track of who has access to what and when they accessed it. The only thing I dislike about this system is how slow it can be at times. Sometimes it takes 10 minutes or more to load a page. This is not ideal as it makes keeping track of time sheets much harder. If you want an easy way to share rooms between multiple people, Expressroom is a great option. We use it to manage shared rooms between our sales teams.