Anyone who uses NetSuite has access to single sign on. What are the advantages and disadvantages?

It's a good way for additional authentication at organization level and it provides functionality to access Netsuite via Single sign on page. Can't think of any disadvantage other than initial setup/ procuring an additional software.

Thanks

Users who log in as administrator will have to log in the standard way and not SSO.

Thanks for letting me know

Just to add on, there's a permission called SAML single Sign On- that enables Role access via SSO. You can set it on any custom role and Admin is excluded from that