I'm leaving tomorrow morning and it was a great stay overall. I've been dreaming about staying here for years so this was a dream come true. There were some negatives so it wasn't a perfect stay but it was definitely memorable.
The Park Suite is an incredible room. Sure, it could use a tech upgrade and some of the furnishings could be refreshed (if you really, really look) but it's still an incredibly comfortable and luxurious room in an understated way. I usually try to spend most of my time outside of the hotel when traveling but this time I didn't mind just hanging out in the room. When you're in a city as busy and loud as Tokyo, being able to have a drink and relax in utter silence while lounging in the plushest robe ever is priceless.
Most of the service was fantastic too--the staff was always incredibly polite and helpful. I'll echo the previous comments about New York Grill though. It shouldn't take more than 10 minutes for a simple drink to get to the table, especially when the bar itself isn't that large. The other thing that really turned me off to the place were the escorts who were working the room. On my first night, I was relaxing and listening to the band until this woman sat next to me ( there were lots of free seats) and started bothering me. On another night, I stopped by for a quick drink and watched this woman trying to work this couple--the guy was into all the touching and stuff but his girlfriend/wife just looked on nervously.
Overall though it was an amazing time and I hope I can return again soon!