Any lessons learned from connecting SF EC to ADP Workforce Now using SF Integration Center?

[JoernM]

The Purpose: we decided to integrate SF EC to ADP Workforce Now using SF Integration Center for US business.
The Challenge: ADP Workforce Now requires data transformations in our CSV export file that cannot be easily built because we do not have an If Then Logic. As a result, we can probably meet the requirements by sending 3 different files that follow different logic.
The question: Is there anyone who has successfully built such an integration using SF Integration Center?
If not, we would look at SAP's CPI capabilities. That's a big gun, though. 

[nageshrao]

In my opinion and experience, building it with Integration Centre was very difficult. Rather we couldn't achieve delta using that. So we built a custom interface on SAP Integration Suite for integration between SuccessFactors Employee Central and ADP Workforce.

For our custom iflow we took inspiration from the below existing community template for third party payroll integration. 

https://github.com/SAP/apibusinesshub-integration-recipes/blob/master/Recipes/for/sapsuccessfactorse...