This is the most reliable so far and a good part of the reason I plant pole beans. The pole bean canopy they love. A source of drinking water under it and they will stay close for the entire season. They do a more efficient job than spray and they seem to like just about any kind of insect. I do keep neem oil/soap around but these guys keep use of that to a minimum.
They're everywhere. When I walk out the door to the garden, the leaves come alive with these guys scurrying in all directions. Since the containers are close to the beans, bugs don't fare well scaling the sides of the tall containers before being spotted. They can wipe out a string of aphids with one snap of the tongue and competition is fierce.