Very stable product, also quite bulky for a wristwatch, however. (I even use it without a strap or pocket, but the size is quite ok). Good: The clock can be easily opened for battery replacement (4 small Phillips screws). Weak: In the product description is provided for the CR1620 coin cell battery, but in fact the larger CR2025 button cell contains the clock (1 point deduction for defective product description).
