I am very happy with wrist strap. So far, the camera dangling always wrapped the belt around my wrist to my hand. Those days are gone !!! Even though my A-57 with the Tamron 18-250 all day on my hand was there were no problems.
The hand strap is comfortable to wear and well finished. Therefore, it should really be 5 star.
A star I subtract but as for replacing batteries, the base must be loosened and rotated. The mounted base plate of the wrist strap conceals the battery compartment for the Sony A-57.
