Good quality at a resonable price, why? That's easy, if you set the clock for a clock and later the pre - or decline controlled, should be to 24 hours of not greater than ± 30 seconds. This simple test, the clock with Leichtgkeit passed (+45 seconds 48 hours). It was a gift to my daughter and her has the execution (Polished case and stainless steel band) really liked, it sets the clock no longer from.