Been a while since I wrote anything, had some personal stuff I was taking care of, but I'm back...
Had to dig up some articles on Kerberos and SharePoint 2013 so here is a snip of the email I sent to my customer for you 🙂
First off here is some great reading on Kerberos in SharePoint 2013 https://technet.microsoft.com/en-us/library/ee806870.aspx and this would be the one-stop shop for everything Kerberos http://social.technet.microsoft.com/wiki/contents/articles/4209.kerberos-survival-guide.aspx.
For step by step instructions on setting up Kerberos please follow this article https://blog.blksthl.com/2012/09/26/the-first-kerberos-guide-for-sharepoint-2013-technicians/ these are very detailed steps. If you need any help verifying please let me know.