I've owned several g-shocks. I bought the GDF100-1A because other reviews praised it's slightly bigger display and better backlight. They were right, this watch delivers. I've noticed that I can see the display better at just about any angle. I also love how bright the backlight is on this watch. The watch is comfortable to wear everyday and it sits on top of the wrist without being obtrusive. I like big watches but this watch does not wear big. The sensors are OK. Many reviewers have complained that the temperature sensor is not correct when wearing the watch. This is true but a true temp reading would only come with the watch sitting in the environment and OFF the wrist. Overall, I highly recommend this watch.