This link below is to only one of a number of articles I've seen recently concerning the latest Easter egg in iOS 9.3.2: it's reported ability to brick some of the iPads of some owners who have upgraded.
http://www.forbes.com/sites/gordonke.../#191054a95db7
Most of the articles I've seen focus on problems some iPad Pro users have experienced, but I'm not at all sure the problem is confined solely to the Pros.
Has anyone upgraded yet, and if so, what has your experience been?