I havent had time to get acquainted with the software fully.
If I am not mistaken, you have to use 1 camera, calibrate it using their supplied grid and then take multiple shots at set distances (360 degrees) to build your point cloud.
There are a few research papers that are posted on their site that can explain the cloud density you are interested in finding out. (Depending on camera MP rating, and etc)
Also they have a few case studies available that may answer your questions.
Lastly, if you are truly interested in buying or trying their software, send them an email, their sales/support seems motivated to help.