I've interpreted their transition order, based on letters sent by 23&Me and a forum comment by their spokeswoman, as (1) purchased Oct 22 or later, (2) uncomplicated v. 4, (3) uncomplicated earlier chip versions which might require a free retest, and (4) complicated or mixed accounts. The last wasn't explained, but I'm guessing those are accounts with mixed chip versions and/or kits from more than one country. Could be way off on that. If Open Sharing requires both parties to be doing Open Sharing (and sounds like it will), we won't know how popular this choice is until everyone has been transitioned to the new site. Barbara