Looking for an alternative to flash the Speedlite offered by Canon, I came across the Cullmann flash and his identical "congeners". On the Internet there are some harsh criticism of these devices, although not kept me from the product, even if a trial basis to order. The packaging is functional, but spartan. No frills, no bells and whistles, all created to adequate protection of the flash unit. So ok. The flash itself acts meticulously crafted, as there is no mE criticisms. A short, informative and concise guidance is. The device charged with battery, put into operation - and since then thrilled! The Cullmann flash works flawlessly, the results in the picture are in direct and indirect flash absolutely clean, the communication with the camera's electronics without any problems. To summarize: do not regret the purchase and recommend the flash full!