Arc seems to be working just fine though I haven’t yet tested it in some of the iffier mobile locations in my rural area. But I am hugely disappointed that I cannot use genre to focus the search in My Library. I know that Genre is not “housed” under My Library in the base software, but neither is Playlists and that is available in Arc. The lack of Genre and of the Focus and Bookmark features make searching more complicated than they need to be. This is especially so when using Arc in limited roaming conditions. I hope that these features can be added in the next iteration of Arc (if I haven’t missed how to find them in the current iteration).
This is just the first version of ARC. Focus, Genre, etc will be added at some point as the new software grows with future releases.