YONGNUO YN622C-KIT Wireless Remote Control 100M E-TTL Flash Trigger Transceiver Pair Kit for Canon EOS Series DSLRs

Great product, you will not be sorry. The only thing I don't like is the AF beam.

Works great

I've used this now four times and this set works flawlessly. I used this with two flashes, a Canon 580ex and 580exii. With the 580exii I can control the power output on the flash remotely from the transmitter on my camera. However, I cannot control the power output remotely with the 580ex - I can only fire the 580ex. So I purchased another 580exii in order to use these transmitter to their fullest potential. And they're great. I see that Adorama sells two 600rt speedlites with the Canon transmitter for $1200. If you have two 580exii speelights already, this Yongnuo radio transmitter system costs under $120. That's 10% of the "new" flash set up. Unless you REALLY NEED to have the latest flashes, I'd say save yourself over $1000 and take a mini vacation or buy another lens or buy an awesome guitar (I did!).

I've used these for portraits and in weddings with Canon 5D II, 7D, 50D and 580EX II flashes and they worked reliably and consistently, and with perfect TTL exposure. The controller unit was pretty intuitive for me to use and I was able to easily control my flashes from it. I have used pocket wizard in the past but can't imagine why anyone would spend that kind of money when products like these are on the market. I absolutely recommend this product and will consider other Yongnuo products in the future. UPDATE: I tried using the Canon flash/Yongnuo combination with my Olympus micro 4/3 camera and it worked very well, too. Obviously in manual mode, not TTL, but the controller allows me to adjust the output of the flash very easily without having to access the flash itself. Brilliant product.

Love these triggers. Being able to make changes to the exposure of my off camera lights from my camera is awesome. I haven't had any misfires yet and I've used them for 10+ shoots.