I emailed HGP on November 18 with the proof of my Hilton Goldness. Challenge kicked in on November 20, and on November 21 I checked in to the Hyatt Regency Boston (was upgraded to a suite too, without a voucher). On January 15-17 I stayed at Hyatt Park Ararat Moscow (surprisingly cheap) and completed the Diamond Challenge. The points have now posted and my account says Diamond until 28 February 2015. Thank you!
