Just wrapped up a 2 night stay as a Gold. Can't say I was impressed.
I booked a room for 3, ended up getting an extra bed which apparently cost me my upgrade. The front desk staff said they'd already set up the third bed in a "bigger" room, so I couldn't be moved to anything better. When I got to that "bigger" room, the extra bed wasn't even there, taking nearly 2 hours to arrive. The bathtub was quite dirty, and the shower made a rather loud dripping sound when draining.
They also tried to charge me for the third person's breakfast by offering a "special package" of THB500+ per day, which I refused.
I wouldn't be rushing back anytime soon.