The major issue we have with Auto-Expanding Archive, and that is not mentioned anywhere in this article, is that it is not searchable. In order to search in folders that are located in the Aux Archives, the user must search each folder individually. That is not how search is supposed to work. Search is supposed to search across all folders... While I am told from multiple levels of support that "this is by design", I cannot reasonably accept that statement because I don't understand how Microsoft could stand for something being "broken by design". "Broken by design," is not a good motto to associate with.
Any insight how we can get this searching feature working 100% for the end user would be helpful. I have also found in the UserVoice an issue and voted it up.