I'm using now 5 STK ...
Mixed with ..
EOS 5D MKII, EOS 7D
580EX, 430EX, 430exII ...
Everything works beautifully. Sometimes verifiable deputy also flashes on, and use 2 cameras (which then flashes the same via radio trigger) .. The set has an incredible price and offers everything you could want. The flash control via the camera display only works if you use a compatible flash.
580EX and 430EX can not be controlled via the display. That can only the newer versions like 600EX, 580EX II, 430exII ...
I use the device at weddings and in the studio with water shoots. All non-issue. Super reliable.
Only the distance to the lower flash slide I find something offense. The fastening screw has not enough space. Who wants this tighten so needs little finger.
In addition, the YN622c have a built-AF illuminator. Frankly I find the auxiliary light of YN622 even better than the original Canon flashes.
After a test, we also know that you can use these devices with Nikon cameras easily. That you have to do everything by hand but with the restriction. HSS is not possible in combination with Nikon.
The YN622 are a great substitute for the much more expensive PocketWizard.
