LiecaMan; Depends on what the job is and how large. If you are doing work in rivers or harbors where the bucket is underwater or over the backside of concrete walls where the bucket is out of site, the system is invaluable, works great, the operator can see where his bucket is in relation to the grade or physical obstacles, depending on how detailed the 3D model is built. // On mass excavations the system can be a great asset as far as keeping the operator from undercutting the grade or digging into the toe of a slope, thus keeping rework to a minimum. A crumb dozer is still needed to keep production at a high number though, and the dozer. if kept in the cut can eliminate the usefulness of the excavator system, but if the dozer is used for multitasking, such as, on the haul road periodically or on slopes at the fill or for whatever the need, the excavator system can sometimes be justified. But the great thing is, with most systems they can be used on almost any machine provided you have the software for the setup. We use the same control boxes and monitors in multiple machines. It just takes a few minutes to go from excavator to dozer, and maybe a half day to go from dozer to excavator. Even put one on a grader one day.