I've been buying photo equipment at Amazon for 10 years and have never been compelled to write a review. However, this has little lightning impressed me enough to let everyone know how good it is. If you are using flash in studio or on location in manual mode This is the flash for you. Buy a set of C3 Remote Trigger for your camera and you're ready to go. I only had the flashes for about a week, but I have extensively with them and have had good results. I bought two of them to go along with the other 7 flashes that I have and they are now my favorite. This includes my Canon 580 EXII. The built-in radio trigger makes the difference in the world. Insert four batteries in the flash and stick it on a stand, and you are ready to go. No external trigger on with batteries or far away they are on or off care. I trigger this with the C3 on my camera and the other blinks S1 mode. In summary great flash.
