Flip. I'm in the TV/Production world, not stills. I shoot on Sachtler Speedlock and Speedlock HD CF legs. Twist-locks are the work of the devil. There's not a set of twist-lock sticks in the world that can be adjusted faster than my Speedlocks. Gitzo-type legs may be more versatile, height-wise, since they get down to hi-hat level, but where it counts for me, being able to adjust the height QUICKLY, they suck. And every pair of Gitzo's I've ever seen that really get used in the field have F'd up leg locks, so it usually takes at least two to three times longer than it would have anyway with them to adjust them.