If I have the option of using .Net
and can do data transformations
just fine in .Net, when would I need SSIS
? Is there a certain task
SSIS is great for BI applications, you can manipulate the data on Stage Table and than make avaiable on DataWarehouse tables to be used for BI.
I can connect on SAP, Oracle to get employee information and make avaiable on PowerBI, QlikView, etc...
Its a nice tool if you know where and why use it. Use ir because its cool you will have troubles.