I got one a couple of weeks ago. It has a full grid with numerical indexes in both dimensions. It has a vertical magnet that contacts the barrel, with no marks or gradiations. Before mounting a new scope, I put it on a rifle that I knew was sighted in for 200 yards. I just kind of eyed it as to line of sight with the scope, and centered it vertically on the barrel. Took a look - vertical crosshair right on, horizontal a couple of marks above the middle. Another sighted in rifle - same story. Mounted the new scope, and took it out to the range last weekend. Unfortunately, the wind was gusting to 35 mph out at the range on Sunday so I left the rifle in it's case, so the real test is still waiting. Will let you know how it works when I get another chance out at the range.
Hope this helps - JohnDog