Many owners of the recently released G-Shock Gulfmaster GWN-Q1000-1A are reporting a serious problem with the watch in which the hour and/or minute hands do not return to the correct position after sensor mode or using the hand shift function. For this reason we recommend buying this model from an authorized Casio dealer so that you are covered under Casio warranty and can send the watch in for repair. If you buy it from third-party sellers make sure they offer a good return policy. Some owners are reporting that their GWN-Q1000 does not have this problem, so apparently not every single unit is affected. At this point we do not know if this problem is isolated to a certain batch, if it is widespread to other GWN-Q1000 models (such as GWN-Q1000-7A and GWN-1000NV-2A), or if it has been corrected in newer batches.
Read first-hand accounts about this problem at Watchuseek.
A video of the problem has been posted to YouTube by premieroutdoors:
Note: This problem is specific to the Gulfmaster GWN-Q1000 with the water depth meter and does not affect the previous generation Gulfmaster GWN-1000.