At first, I was happy. Then there have been elements of doubt, especially for wireless triggering. It will take a wireless transmitter / receiver for more results.
It is powerful, ergonomic, fast and heavy. I have no grip on my 60D, but if I had one, it would make a craft requiring about 2 kilos.
Attention, it does not fire if you are shooting in LiveView and if you have not disabled the "Silent Trigger" mode of your enclosure. I was pleased to resolve this problem.
A good flash, anyway. Must tame it, that's all.