I recently stayed at Mission Hills during a long, international business trip and was very impressed. The rooms afford all the comforts of a five star hotel - separate bath and shower, double sinks, plenty of room to stretch out, and lovely views of the championship golf course. I had a massage at the spa which was also great and on-par with what I would expect from a decent spa. Very nice after long travels. I also felt safe enough to go on a nice run around the grounds in the morning, which was necessary since the gym didn't open until 7am.
I didn't give this property 5 stars because of two things: the gym hours and limited wine and beer list. Both an accessible gym and decent wine list are necessary during long business trips. That being said, this is likely THE best hotel in the region and provides a nice escape from the general Shenzhen madness.