I have been wearing a 2nd Gen Seiko Monster daily for about 8 years. It ran about 20 seconds slow per day for a few years. That gap grew to about 30 seconds for a long time. I just reset it as needed. A month or so ago, it started running 3 minutes per day fast. That was unacceptable. One week ago today, I set out to regulate the 4r36 movement. I downloaded a timegrapher app. I regulated the watch using the app. Today made 7 days since I regulated and set the watch. After 7 days, the watch is running 42 seconds slow. That's 42 seconds it lost in a week...Much better than even when new.