When I arrived at the hotel, they tried to tell me that I needed to pay them $60 per night for my existing room. They should be able to confirm it at no cost. I replied back that I had requested the upgrade using my suite nights allocation. The day before I arrived, I received an email telling me I could upgrade to a one bedroom for $60 per night. I booked a studio suite and I requested an upgrade through Marriott using my suite upgrade allocation.
We stayed at the JW Marriott in Las Vegas over Thanksgiving in November.