I play around with settings on my Darwin with different juices and so far what I'm finding is that WTA tends to like lower settings. Right now I'm vaping at 5 watts, and the voltage reading is 3.5 for you non Darwinians, and I find that the effect of the WTA is really enhanced. It seems to me that anything high enough to give you a throat hit doesn't allow the WTA to come through as much. This isn't a matter of taste or anything else, it's just looking to get the most out of the feeling of the thing. So that's my experience so far, in my first day vaping WTA with my first juice I've tried, so I'd be interested in hearing what other people's experiences are here 