Got this for Christmas to replace my Luminox. I have had three Luminox watches that I used in the water often. Luminox quality has definitely declined. I asked for this watch due to it being automatic and the illuminating characters. The illumination lasts an hour compared to the indefinite Luminox illumination. I can wear the Promaster all day. Set it down overnight and by 6 o'clock that following day it has stopped. I bought a automatic winder that rotates every 6 mins. alternating directions for two minutes. Still will not hold time if it is set down for 24 hrs.