Over the past five years, I have purchased several battery-powered Luminox watches. They have all performed well, with the 3351 being especially accurate time-keeping. Thus, I was very disappointed to receive a 0937 automatic which was losing 15 seconds a day. I sent that back and received a replacement which gained 12 seconds a day. For a watch costing over $1000, it seems to me that it should keep good time i.e. lose or gain less than 5 seconds a day. My 3-star rating is based on all the watches I have, not just the 0937. For the 0937, I'd give Luminox 1 star.