I bought both this one and the ADM. the ADM is better. This laser is a little weak and there is no way to simply turn the laser on and leave it on while adjusting Alt-Azi. I taped the small ring that comes with it to the laser and it works well enough, but the design of the AMD includes a dedicated adjustable screw for this purpose in the rings, which works very well. The one really good thing with this setup is the base, which fits all standard mini-***** style attachment plates. The AMD base is flat and in one version comes with a standard *****- dovetail dual use attachment clamp. If this model incorporated a threaded hole in the rings for a fourth screw to control the laser like the AMD rings it would be ideal. I plan to drill such a hole since it is otherwise ideal for my purposes.
I know what this is supposed to do. I did not find it that helpful.
It was very easy to align and creates a beam that makes it easy to point the telescope at the desired target.