University of Illinois Urbana-Champaign is participating in the TIER Campus Success Program.

Follow their blogs here. As of Feb. 2018 they are off to a great start in sharing their Grouper journey:

Getting Over the Hump with Grouper

https://spaces.at.internet2.edu/x/IoBQBw

In addition, University of Illinois Urbana-Champaign presented on their Grouper deployment, with a focus on handling affiliate users, at the IAM Online webinar on Feb. 14, 2018.
See the slides here:   https://www.incommon.org/docs/iamonline/20180214_IAMOnline.pdf and recorded webinar here: http://internet2.adobeconnect.com/p03kw4etow2t/