I am a big G-Shock fan. I bought my first Riseman many years ago and have purchased several various G-Shock designs over the last several years. When I first saw the GDF100, I noticed the display was slightly larger than most other G-Shock designs. The face seems more open and less busy. The watch fits comfortably on my wrist and wears like a medium/large size watch. The buttons are a bit recessed but that is a part of the design. If you wear gloves, you may have a tough time switching modes. The band is very comfortable and flexible, unlike many other resin-type bands. The watch stays put on my wrist and does not "float" up or down, as some watches tend to do. The TBA functions fairly accurately and flawlessly. The illumination on this watch is one of the reasons I bought this watch. It is by far the best G-Shock illumination I have ever seen. I hope Casio continues to improve on the designs of their G-Shock. Many people are wanting to see bigger/easy to read displays. The GDF100-1A is a huge step in the right direction.