Cognos ReportNet - experiences ?

Hey NG

Anyone got some experience with ReportNet that they want to share with us?

- Is it as good as it sounds?
- Will it replace Impromptu/IWR/Cognos Query?
- Any disadvantages?
- How well is it integrated into SAP Portals?
- Is anyone using it on top of SAP BW and if so, why (since they have BEx)? 

Regards

Tobias