If you need rapid deployment including varying height options, they are OK. They are not super stable either from a standing or sitting position, but still much better than shooting freehand. For coyote calling, I use a Night Stalker Tripod. It is so much more stable.

However, I do own and use a Trigger Stick once in awhile for walking around shooting misc. targets such as raccoons, rabbits, etc where you might be shooting from many different positions, have to deploy really quick, and extreme accuracy isn't required.
Korey Kirschenmann
Night Goggles - Pro Staff