I'm going to be upgrading from 1.6.0 to 2.0 and I was wondering if there's anything I need to watch out for. Have there been any reports of issues with the upgrade? Does the IPAM info become a separate database like NCM is, or is it still part of the main DB? What about integration with NPM? Do user permissions transfer or will I have to go through and reset all of those, as well? Anything else I haven't thought of that might be a gotcha?