This flash is easy to use and is relatively strong, providing very good lighting when properly adjusted. My only complaint is that certain parts tend to rust easily despite my thorough cleaning after each dive and regular maintenance. The same was true of the previous version of the Digital Pro Flash, which I also had. In the current version, the nob to adjust the strobe intensity, as well as some of the electrical connections inside the nob, rusted between trips. This made it hard to manually adjust the intensity during dives. I've somewhat fixed that issue now, but it is still harder to turn the nob than before. Otherwise, I've been very happy with this strobe, and the servicing by SeaLife technicians.