The important thing to remember is that using the dolly is a camera technique through and through. It is not important enough to consider the dolly as a piece of equipment but instead realize that its use is a camera method choice because there are only certain ways of utilizing a dolly correctly and it will inevitably give the visuals of a scene a very specific design. A dolly is really only effective if you are using it to follow people walking from behind, guide them up front, or capture them from the side while moving in the same direction that you are. You can try to turn the dolly while using it, or the camera, but these have to be very specific motions that are well planned and still follow the same tracking principles as the big three dolly positions.