We use it, and it works great at times, and not at other, we have a mix, some of our users can use it and others can not, anyone that wants to edit our website, can not, as SSO is not supported, anyone in our warehouse that logs onto one of our hand held scanners, can not use it, as the scanners interface does not support SSO. Its a pain for admins since they can not use it and to do any testing in a role that does, you have to duplicate the role and remove SSO.