Just to give some background. I have a auto scope that nails everything dead on, problem is, it requires two people to be productive. Lasers can be inaccurate, it does depend on how you use them and without a doubt, the quality of them. We always calibrate ours (at work)every morning. By going to the two extremes of your project approx. 180 degrees from each other and marking your pole, you get a good idea where your at. Taking the average of that reading makes for some pretty accurate shots. I also find it best to come up to the mark with my receiver rather then down. For setting forms, lasers work well. It's rare on residential work to shoot 100' since the laser will be set up somewhere near the center of the project. For commercial work which the only place I have any real experience with lasers you will frequently encounter long distances. If the shots critical, we shoot it with a scope like a auto level. For much of the rest, we set up a laser, a $5000 model that works pretty well. It just so much more productive in the forming stage to use laser when 3 or 4 teams are all working the trenches setting forms. When you get in over your head (literally), lasers can really aid since you have sight or sound to guide you with less interference from all the racket that one finds on a job. My need for a laser will be ongoing since I am in the process of getting geared up to build my home, for the most part by myself. I typically double check myself with my scope.