I evaluated many products to support my Scrum focused projects and Rally was far and away the best. It is one of the best examples of the SaaS (Software as a Service) model in action. I don't have to worry about equipment to maintain, I simply log on to my Rally account. Managers are blown away with the insight they get into the health of a project when they see the Rally burn down charts. Developers are empowered when they go in to the system and update tasks they have taken on and see the progress reflected in the burn down chart. Sprint planning and maintenance is a snap through the advanced web 2.0 interface. My clients see the value very quickly in using the enterprise edition. It is well worth the fee.