I have been using a Blisstool since July. I love the machine but it took time to get used to it. Superior to any machine in depth, ground balancing and Knocking out nails at depth. I have owned 36 machines in about 27 years and this one is the deepest by far. I dug a mini ball at 14" the signal was moderate. I had the gain on 2. Blisstooldigger