My colleague from work and I stayed here for three nights four days when we were in KK for the MELTA conference (as presenters). There is more than one Tang Dynasty, so you have to be very clear in telling the cab/grabcab etc that it is the Tang Dynasty Park Hotel, next to the UTC (if I remember correctly).
To be very honest, when we first pulled up to the hotel it looked very dinghy, and we were afraid we would have to deal with inefficient service and dirty surroundings. The hotel is quite old, you could see from the worn out furniture in the lobby and dining area.
However, the staff members were friendly and I must say service was efficient throughout my stay. The rooms are cozy and clean. I had no problem with my room, but my colleague had to switch rooms because of water leaking in the bathroom. Otherwise, she also found it clean and the service pleasant. It was also peaceful and there were no disturbances (I slept very well on all nights). Rooms can be very dim because lighting is not very bright, but I was ok with that, it added to the coziness. Finally, Wi-fi does not necessarily work (we were given passwords and tried to login but it kept asking for voucher numbers, which staff confirmed was not necessary information, but did not get to use Wi-fi in the rooms because of that). Also, irons are old and burn fabric really easily if you're not careful in the way you use them (unfortunately they are of poor quality), and I ended up burning a scarf of mine I had ironed endless times before just at one touch.
Overall, it is clean, staff are friendly and helpful, and rooms are nice and cozy, no issues there. Thank you to the staff who tried as much as possible to be as helpful as possible.