I went for a free trial at Fitness Studio, Gurney Tower. I did hear some bad remarks about instructors not being fit (or having bad stamina), but the class I went for last Sunday was great. Those are local instructors (Sadly, it'd be more cool if they are foreign instructors like Celebrity Fitness). Fitness Studio has a wide variety of classes and mostly of Lesmills.com. I would consider the weekend package, which is only RM50/month. (Same pricing as Priority fitness at Ivory Plaza). With that, by comparing the 2 clubs, I would rather go for Fitness studio, as it provides better facilities (shower room, free flow of drinks, car park only Rm10/month, wide variety of classes). Mostly importantly, i felt the pain in my butt. It must be the ABT class that I attended.