I've been doing some initial testing of this feature and really like it. I think it has a lot of promise to increase safety. However, I think I may have found a couple bugs with the downloads for the East Central and Pacific data packages.
When attempting to download the East Central elevation I'm presented with the "Downloading..." message immediately followed by "Download Failed". The download settings are This Cycle and Main Server but I have the same issue with Next Cycle and Backup Server.
Attempting to download the Pacific elevation displays the "Downloading...." message. This is followed shortly by the progress icon which quickly progresses through downloading and installing, but then completes without actually downloading the data or so it appears. Again, this is using the current cycle and main server, but behaves the same with Next Cycle. If I switch to either cycle on the backup server it behaves like the East Central package where it immediately gives the error message "Download Failed".
I have attached a couple screenshots I was able to grab in case they are at all helpful. Because of where I am located in the country I normally download data for both the North Central and East Central areas which is how I found the issue to begin with. In my troubleshooting I attempted to download elevation for all areas and found the anomaly with the Pacific area as well. As you can see in the one screenshot, all other areas downloaded successfully.