>If you've ever used the Fox report writer you should be able to pick up SSRS basics in an hour or less.
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On the report writer itself, sure - and truthfully, if someone has used the Access report writer, a similar statement could be made.

Where the learning curve comes in is just the general concept of the environment....SSRS projects in BIDS/SSDT, shared data sources and datasets, deployment, how SSRS handles procs, the nuances of the report manager/report server, how to put a report on a custom web page. Not rocket science, but each one has a bit of a curve.