After fussing with everything over the years (Yungnuo triggers, 7D IR trigger, PocketWizard TL, etc.) I grew to hate the looking out of the corner of my eye with ever photo to see if the flash fired or not.
I recently splurged and bought the 600EX-RT and ST-E3-RT and am completely enamored. I just trust this setup. It's amazingly versatile and rock steady. I'd go as far as to say I am happier with this "upgrade" than moving to a 5D3.
I ran in to a slight challenge this past weekend when shooting that led to my first gripe. I did my research beforehand and knew this was an issue, but now I'm kicking myself a little for "being cheap".... I was shooting a couple minutes after sunset, and I wasn't able to get focus.. The fact that the ST-E3-RT doesn't have an AF assist is silly. I probably should have bought another 600EX-RT instread of the ST-E3 as I would have had an AF assist and may consider that at a future point. Although, that's a very expensive AF assist, when something like a flashlight (which I ended up having an assistant use) will get me there too...
I'm hoping Canon will announce a non-flagship RT flash in the coming months that I can use for off camera in these situations.
But, I wanted to put this out there as a reminder to those that think the ST-E3-RT and 600EX-RT setup is ideal setup for off camera flash. It is... 99.9% of the time.

