It depends on what your going to do with them and how often. We have sold a number of them, not many problems. They are a good unit. They use a chain reduction system inside the box to reduce speed for the auger. They work fine for occasional use digging a post hole or something similar, not really heavy duty enough for daily commercial use or with an auger larger than, say, 12 inches. Also, depends on what part of TN your in. If the eastern part, the soil is workable. If your in middle TN around the Nashville area with all it's limestone and shale formations, it would have a bit of problem with that stuff. Hope that helps.