I started using SSRS yesterday and am already growing to love it (i’ve been using Crystal Reports for about 3years!).

Top points to note so far:

-Dynamic sorting is handled within SSRS (requires manual work-around in Crystal Reports, although i believe a dynamic sort control is being delivered in Crystal Reports 2010)
-Dynamic grouping appears to be simpler
-Multiple datasets can be used within the same report (Crystal requires a single dataset per report/sub-report)
-Dynamic Parameters can have “complex” queries to return the list of values (CR only allows you to pick a field from the main report’s datasource)
-Parameter Default values can be calculated using a formula or SQL statement (this is a god send- allows you to default start/end dates for monthly reports for example to the 1st/last of the month- not possible in CR)
-Collapsable groupings (i’ve not used drill-down sub-reports in CR- these may offer “similar” functionality, but  i don’t think on the same level)

There’s more that i’ve forgotten or not yet realized :) I think a lot of it boils down to SSRS being part of Visual Studio and being able to harness a lot of it’s capabilities… that’s all for now.

On a different note: I finally jumped on the Skype bandwagon- search: leetickett