I have the Flambeau Lone Howler coyote decoy. Not a great product IMO, but I have used it with success on several occasions... more than enough to cover the cost.
I will have to agree with those that have pointed out the inconvenience of packing in the additional gear, so I too, only use it on specific stands at specific times of the year.
I do not worry about there not being any motion...I set up down wind of the area I know the coyotes hang out in...same scenario AWS described in his post...private property I cannot hunt,(where the coyotes spend the day) next to the public property I can hunt. I like to set the decoy in a low natural drainage, I can see by tracks the coyotes use this drainage to travel in and out of the public land. I do not try to coax them out of the low natural route they are comfortable traveling in. The perfect drainage is a couple hundred yards wide draining to where the coyotes are, N to NW in direction. That keeps the prevailing winds in my face and the low winter sun in their eyes. I set myself up so I can see my decoy and look down the drainage. They will hear the intruder, know he is in the drainage, and come find him. I play the Challenge Bark continuously until I have one close enough that I know he sees the decoy. This can take a while, I have had one bark back at me for more than a half hour before he finally got mad enough to come in to see. This is when the fun begins..by then he is so pizzed off by the intruder he is not worried about getting out of the drainage to get down wind, he has his hackles up and fangs out and is ready to kick butt. Decoy has their full attention. They can put on a good show with all of their displays showing how bad azz they are. It is worth watching one time...I know it is hard not to take the shot if you have one standing at 100 yards or less...no guarantee you will get to see a display if you let them get closer.
The other scenario I have used the decoy with some success is on large frozen lakes or ponds that have a large area of cat tails around them. With the wind and cold here in SD, the coyotes like to hunker down out of the wind in the cat tails. Difficult to get them to come out into the open. I set the decoy out in full view on the ice and hide myself on the edge of the cat tails. Crank up Pup Distress. I have had them come in hard, focused on the decoy all the way. Nice open, flat shooting area on a frozen lake. If they only step out on to the ice on the far bank and hang up, I already have a good idea on the distance because I use the measuring tool on Google Earth to measure distance from where I think I will set up to different points on the edge of the lake/pond where I think the coyotes will come from.
Sorry about the long post...with the high wind here today the feels like temp is below 0...had to find myself something to do...