On-Premises Data Gateway using Kerberos for SSO

[RanE]

Hello experts, 

I have just read the following artice about Use Kerberos for SSO from PowerBI to on premises data sources:
https://powerbi.microsoft.com/en-us/documentation/powerbi-gateway-kerberos-for-sso-pbi-to-on-premise...

I have a couple of questions:
1. What the pros of utilizing this option? Why would you want to go with this rather than the "traditional" power bi gateway that is currently offered? 
2.Is the preview version out there avaiable for download? i wasn't able to find any links to that. 
3. Is it an acceptable risk to have the gateway reside on the same system as the SQL Server when impersonation is configured, or should one have a separate server configured with constrained delegation?

Any other information/clarifications would be much appreciated!!
Thanks!

[Jon-Heide]

Suggest you try posting your question under the following section:

https://community.powerbi.com/t5/Integrations-with-Files-and/bd-p/power-bi-services