Have stayed in Jin Mao Tower some years ago therefore my knowledge may not be completely up-to date. But generally speaking this is the most impressive hotel I have ever stayed.

It has a very clear and straight architecture with this aluminium-glass pagode design (how I would call it) located around a really huge atrium. Therefore its like a skyscraper with all of the rooms located with outside views and no courtyard views.

If you know this construction details you can be sure that there is not even one room which may have a "bad" view. They all have great views. And when I remember correctly the construction is nearly symmetric.

The different room types vary in size and location. Therefore I would recommend (if you can afford it) a room with a "river view". Although new buildings have been constructed between the Jin Mao Tower and the river I think this is the better and more impressive view but not exactly what one would describe with a clear view to the river. The IMHO best rooms have a view to the Pearl Tower and the Financial Center.

"Non-club" rooms are located between 57th (?) and 78 (th) floor. As you have asked what the "private concierge floor" means: This means that the floors 79 up to 83 are dedicated to Club rooms. So no standard room is located there.

And this leads me to a general hint for your booking: They have Grand king/twin, River view king/twin and Club rooms with river view and not with river view.

So I would always reserve a club room . Due to the location on the higher floors 79-83 they are really impressive in view. And you can also use the Club Lounge on 83/84 for breakfast, afternoon coffee and so on. If you would like to invest the price difference to the "view" side is on you.

But strictly recommend booking ANY of the club rooms. If you need this one with the two floor-to-ceiling windows sides (180 view) is on yours. They are more expensive due to the fact of their location is on the "edges" of the tower.

So my recommendations for the stay:
+ Book any Club room if commercially/money feasible
+ Before booking the room you should call Hyatt Gold Passport and ask them if there is availability on the requested dates for the 3,000 points certificates for the upgrade for up to four nights to the Club rooms. So you could book the non club room and upgrade this during reservation.
+ If you donīt have the 3,000 points in your GoldPassport account just buy them (think they are about 54 Euros per 3,000 points, you can buy them in increments of 1,000 points for approx. 18 Euros)

In my persional opinion (and not making advertisement for Hyatt) this in Shanghai is really the greatest hotel with the WOW! factor - if you are fan of modern architecture.

On the other hand they have also completely overrated hotels like the hotel in Berlin, Germany.

And reserve enough time for a SLOW breakfast at the Club lounge.

Hope this helps.