We bought one last year, it is the one they call the 3 1/2 ft. model and the finish rake is 5' to cover the wheel tracks. We have been happy with it as a tool in our lawn seeding business. It seems like we have to make a slight adjustment on it on every yard that we prep(adjust 3rd link in or out-which raises or lowers the finish rake, adjust scarifiers up or down) but once we get it set right, it works like a charm. If it is not adjusted right, it is frustrating. This winter we added a hydraulic 3rd link to our tractor to make the adjustments quicker. I am looking forward to using it again this year. The last yard that we seeded last year was really compacted as the trucks had basically used the back yard as a road to get to a location that they were hauling fill. We did have to make a number of passes, but it made the yard loose enough to hydroseed in little time. We had used a pulverizer before-it worked well, but did not level as the TR3 does and took more passes. I have never used a harley rake and have had others tell me that once you use one of those, you would never use anything else. I guess at this time we do not have need to try anything else as the TR3 has worked well for us.