Simply the best flash made by Canon and the right way to go for professional use. If your not making money off this unit you could step down a model but if your going to step up and start making money this is your model.

excellent bright lighting

Fast Recycling

Bulky

This flash completely enhances the quality of the pictures caught by my camera. It works perfectly in the night. Everything even in the complete darkness is captured with precise quality. It also comes with a rechargeable battery

I have only had a small chance to use this, but so far I love it. I have a 5d Mark 3 and the camera will controle the flash through the menu. It is nice to have a flash that will work with the full range of my 70-200mm lens. The only down side is the price, but Canon had $50 off.

Easy To Use; Fast Recycling; Powerful Output

Heavy

Excellent! Very versatlie and multi-use flash - perfect for almost any situation and covers Canon's low-light deficiencies perfectly! top-notch prodecut and a very competitive price!

with this modifier light is reduced by 2 stops the casing is made of thick plastic which i think is a little too thick not for the amateur photographer.

excellent reliable speedlight with reliable output all the way throught. a big plus for the wireless options on it fits perfectly with my camera's body. excellent in Automatic and in Manual modes

Superior build quality; Reliable; Durable; Easy to use