I'm a fan of most of the deployment guides, particularly for the MX and MS devices, as well as the Site-to-site VPN settings and BGP VPN Design Guide.  All have been very useful.   I would like to see more in depth coverage of the new MG21 series including references to other devices you need to update (MX).  Sometimes documents assume that the reader knows a related topic that is needed to make a solution work.  Although Meraki support is always available to fill-in the missing information! ... View more