Dimension Pro was Cakewalk's flagship virtual synthesizer for a few years, at least until Rapture came out*. Dimension LE was bundled with SONAR 7, but I didn't really use it seriously until the "pro" version was bundled with the SONAR 8 Producer upgrade. It included an impressive sound library, particularly some wonderful string section patches which I've started to use.
* Now Rapture LE is bundled with SONAR 8.5. I detect a trend.