I am a female student naval aviator for the Marine Corps and I wear this watch around the clock. Works well in salt water/oceanic environments as well as Chlorine. If residue builds up around the face, it is easy to clean and overall it requires very little maintenance. I don't find the watch to hinder any physical activities, including wrist and forearm weight-intensive  or load-bearing exercises. Light weight fit and split time features are great for running, and band does not chafe the skin when sweating. Face illumination button is difficult to push, but the watch features allow for automatic illumination when arm is raised parallel to ground and rotated towards you (I find that raising the arm parallel and then twisting the watch towards myself with my free hand works best). It's no Breitling Emergency, but this watch works great for me.