Over on the community portal there has be a 4.2 release of the NSX-mh design guide. It gives administrators of NSX-mh an understanding into the design and configuration considerations around the latest version. It includes recommendations about virtual service nodes, gateways, ToR integration, OVSDB compatibility and more.
It highlights the key differences between MH and V and speaks to its differentiators and shows how they can be used in a large NFV deployment.
The link to this Design Guide can be found here.