Completed a 2 night stay end of Nov using free weekend night cert and overall experience was amazing. Diamond status was well recognized during our stay. We checked in thru the 39th floor executive lounge and got upgraded to Premium King Room for the first night and Corner Executive King Room the 2nd night. Corner exec room gave us the most wow factor with amazing views, compare to regular exec room this has the bathtub with city view. They were original charging 3000 yen for the corner room since Diamond get only two upgrades but waived it during check out, also gave us the option upgrade to King Suite for 30000 yen which we passed. Afternoon tea (3-5pm) and cocktail time (6-8pm) were great additions at the exec lounge, with skewers/hot foods/soups that could substitute your main dinner. Remember to check out the pool, sauna and gym during your stay.