Ever since I've started using my flashes off-camera, I've always been on the look out for reliable trigger/receiver sets for my speedlites. Suffice to say, I have tried a lot of methods -- even utilized my on camera flash as a master and using ETTL mode.
Here's the thing: I've never been a fan of ETTL. It's like having 2 drivers taking control of a single car. When using my flashes off-camera, even when I'm outdoors, I've always used Manual because it's something I found that I have a lot of control over. Never been fond of setting the +/-EV on my flashes and what not. I'd rather go from 1/8 to 1/4 power. I found that it made the most sense to me.