Looking for some thoughts - I will be staying at the Grand Hyatt Hong Kong for one night in september and then moving to the Hyatt Sha Tin for two nights. I am currently a platinum member and have 4 suite upgrades that i need to use between now and February. Two questions - what are my odds of being automatically upgraded at the either of these hotels, specifically Grand Hyatt? Would it be worth it to use a suite upgrade on my grand hyatt stay or sha tin stay?