Price and performance are in this product in order, but who can not live with several seconds deviation or wants to be discouraged by this hourglasses set. The following times I measured with a stopwatch: Time, according imprint => measured time (each in min.: Sec) 12:30 => 00:26 1:00 => 1:04 3:00 => 2:48 (!!!) 5:00 => 4:55 10:00 => 9:55
