A Remodeled Hyatt Reasonably Grand
For Starters
The public areas look great and the designers really got this right. 
They took the old Trump Hyatt Gold gaudy glitz and buried it.In its place is a world class dramatic lobby of today and tomorrow that clearly is in keeping with more of the Grand Hyatt architecture and design tradition more so of Hyatt International standards. 
Check in Reception 
Excellent and highly hospitable with can do anything attitude 
The new and inspired club lounge inside and out is simply sensational looking.
It ranks up there with the slickest looking executive lounges I have seen anywhere in the world. In nice weather they even have an outdoor deck to enjoy the offerings outdoors. Brilliant! The silly dead butterflies on display seem odd to me inside the lounge and I'll assume some decorator’s weird idea of what would go well in the new lounge. 
The club is now located on the 16th floor (previously the 31rst floor) and only there did they do really do a hard renovation to the hallways and immediate areas entering the club. It’s a welcome refresh. It would have been cool to follow through on every floor.....Relocating the lounge on the 31rst floor was a good idea as the elevators are poor and take a considerably long time to get up to that floor. Especially when the hotel has high occupancy.
The hotels elevators are looking worse for wear and they are the same small cramped elevators. One would hope they are slated for replacement or refurbishment.
The club lounge closes for breakfast at 9:30 AM in the morning
For those of us coming from other time zones especially International guests this seems uncaring and insensitive. The breakfast is satisfactory however the hotel should pay more attention to baking quality and variety of offerings as the previously did in the past. Evening offerings are now very minimal also compared to years past. The beverage selection is outstanding
Accommodations’
The folks at check in couldn’t have been more hospitable and welcoming
They upgraded me to a nice jr suite as a Hyatt Diamond long time guest
Unfortunately it was very noisy on a mid level floor facing 42nd street. I liked my room otherwise. The caring good folks here yet upgraded me further to a quieter larger suite where I had a wonderful one night stay overall after moving.
I really appreciated the small refrigerator that they now have in every room!
The unexpected upside here to the new rooms is though the bed is a platform (not a fan of such beds typically) it appears Hyatt has indeed found a mattress that can disguise how firm the platform bed really is. One gets a satisfactory enough night’s sleep. Housekeeping overall needs a little more attention to detail. It seems that they are rushed to finish their duties leaving some small unattended concerns. Mind you it’s still in the acceptable range
The Grand Hyatt New York Executive Club lounge was in years past the Gold standard of club lounge offerings they do need to step up their game less on presentation which is excellent and more on substance. It would bring me back more frequently.
Let’s hope for more continued improvement certainly the hotel has been made more desirable.My thanks to the hotel for recognizing Gold Passport members.
This is where the hotel still shines Guest Program recognition.
The Hyatt may not be the best choice in town but it still remains on my very possible list every time I come into town depending on rate which frequently can be wildly overpriced. The Grand Hyatt is dependable overall and the location can’t be beat. 
Experiences will widely vary due to size of property and a very different array of room types.
While it’s far from a great renovation it’s an adequate one and a hotel after many years is now looking better. The hotels management has changed a number of times over the course of the years. What's great about the hotel is Hyatt finds some remarkable individuals that always seem to care about the customer with or without issues that can arise.
Even though challenges remain at this hotel at times I continue to return thanks to the caring team that helps you to forget this is a large convention hotel with 31 floors and over 1000 plus rooms. 
Just think how hard it must be to manage all guest expectations.
They do reasonably well despite the service bumps along the road.
Thank You Grand Hyatt for many years of caring service at the end of the day and taking good care of me!
Kudos too for being interactive with your customers/customer service online and off!
We can be a hard bunch to please :)