If you have the domain rights, the setup is not an issue. The deployment takes two weeks.

The initial setup really is done by the provider. If you have an on-premises solution, I think you might most likely be more concerned about where the database resides. If you would like to set up a single sign-on module, you can couple this with your agent services to make login easier for your end-users. That would also be also possible in the configurations.  

I rate the initial setup a seven out of ten, where one is difficult, and ten is easy.

The initial setup is very straightforward. We were up and running within a week or two. We also did some training through the company. It was very easy, not a lot of stress or problems.