I purchased the Apollo 15 - lunar lander - moon phase model, and I use it as my daily driver. I know, it's kinda crazy to think a watch like that could be a daily driver, but It's made out of all metal with a sapphire crystal. I've hit it against brick walls, dropped it, and more. The worst that's happened is that I've chipped the white paint in a couple of areas. It still functions perfectly, and there's not one scratch on the crystal. Obviously, it's a very well-made watch, and surprisingly comfortable! I also purchased two straps to go with it (a Milanese mesh, and a tweed). I am able to wake up in the morning, choose an outfit, then match a strap to the outfit. The quick change mechanism takes all of 10 seconds to swap out a strap. Overall, I could not recommend this brand, and their NASA collection is a must for any space fan!