Uncertain of the Use of this Application

Well I am not rating this application because I dont know what rating I should give it. Technically there is nothing wrong with this application. I would just like to know why should I use this application when iCal and Mail are working efficiently for me with iCal data displayed directly on my menu bar through the wonderful "Calendar for Mac" and Mail data is displayed directly on my menu bar through "Google Notifier". My iPhone 4 also syncs flawlessly and wirelessly with my iTunes.

Why should I use this app???

Silver Hawke about Producteev by Jive - Task Management for Teams, v1.0