Took the Cibola with the standard coil out to a pounded camp with iron everywhere. Hunted the camp for four hours, some square nails but utimately dug a eagle cuff button next to a hut. Again, this place has been POUNDED by every type of detector there is...and in a four hour period picking up this cuff at about 2" down in iron...is impressive. The following day took the detector to another camp with more iron and tin...and only found about five buckballs within a four hour period. Needless to say this unit definately does well in iron and better than machines costing +$1200 plus. Field tests were done with each machine and the only detector that could pull a button out from iron i,e the magic wand test of holding an iron nail with a button or coin in the hand was the Cibola or bandido (original). THE GUY THAT WROTE THE FIELD TEST WAS actually right!!!! in his test measurements with his air tests. It can pick up a dime/ bullet/ or quarter at 2ft....but that is in the "air". Actual field depth depends on too many variables, what part of the world you live in etc. The machine is deep, very deep and you WILL dig some iron and junk, but you WILL also dig some buttons and coins. There is no doubt. This machine gives you about a 70% edge over other detectors with mulifrequencies and obviously higher cost!!! In my neck of the woods, ground very mineralized, iron in abundance both square nails and mineralized soil. So the best part of this machine is truly the discrimination in iron. No joke!!! Could it locate a target that is deep? Haven't been there yet as in an eight hour period of testing two very different Civil War camps, the machine did very well.