SAP Self Service Vs Sucessfactor.

Dear Experts,

Can someone provide how ESS&MSS functionality can be achieved in Successfactor.

Below are the quires 

• The scope and span of self-service in Successfactor
• The limits to self-service in Successfactor
• Anticipated administrative overhead to manage self-service in sucessfactor  and users e.g. password resets, queries
• How leave request can handled in Success factor?

Regards

Vinodh