I have been trying for a couple weeks for a 4 star in New York for June 11-13. I have slowly been increasing my maximum bid. Started today at $150 and worked my way up using rebid zones to $170. I got the Westin New York at Times Square at the $170 mark. A little more than I have spent in the past, but not a bad price for summer in New York.
Started at $155 for all zones except 2 rebid zones, rejected. Went to $165 with one rebid zone, rejected. Went to $175 for all zones, Grand Hyatt accepted.