Yes, they’re reliable. This doll is perfect. Upon inspection there were no blemishes or manufacturing marks on the body or head. The skeleton is firm in movement and just feels solid the way a quality product should. Range of motion of the limbs is great. The fingers contain wire to allow posing but are not built for gripping/holding weighty objects. The doll will mimic almost any movement a human can make, obviously within reason. So far, it seems this doll is a well-built quality item.