Easy to follow instructions. A little sensitive to tune in but once tuned ln I checked 30 to 40 ft. of 1X2 oak with no problem. This wood had three quarter inch long finish nails in it. I thought I found them all till I ran the Wizard over it. I like the long length and offset handle on wide boards so your knuckles dont scrape. Light weight and wide scan path make this product easy to use. Little price to pay for what it can save in nicked tooling. This is the updated Lumber Wizard III.