Just completed a stay at the JW Marriott Shenzhen. As previously mentioned in this thread, most taxi drivers don't know about this hotel or where it is located so it is imperative to have the hotel's name card to give the taxi drivers.
I paid for an upgrade to a corner room suite an suite and it was magnificent. Beautiful marble bathroom and shower area, with a separate oversize tub to soak after a long day. Fitness center was nice too. Machines were all very new and nicely kept. Executive lounge was very spacious, but the food and wine selection were not great. I guess you can't/shouldn't complain when it's free. Staff was very accommodating and professional.
Overall, my stay was very good and I would definitely come back to his property. ^