The cool features of RTC are:
1. Work schedule that shows your work in different bucket: Today, Tomorrow, Next Week, Future and Not Planned. Also it is highly customizable
2. Moving around with the changed files to different 'Change Set' is another cool feature. It might be a feature that is very basic but people who are trapped into Rational UCM, feels the difference
3. Suspending a change set and then resume it later sometime. Awesome!!!
4. Incoming change set bucket shows all the change set that are not yet accepted to my Repository Workspace. Now I know what are the items pending to make my workspace up to date.