Reaching out to see if anyone has been through this integration already and would be interested in sharing their experiences.
We are integrated with SAP C4C for about two years now. We have used Riva as our integration partner. I would be happy to talk with you about how we handle some of the things that would be out of the box with Salesforce.
Also, they announced at the Summit that there will be native integration later this year through a connector built by TIBCO. Happy to chat if you're interested.