It will null out on iron.... Even used they are on the pricey but for water hunting in trash they sure do the job for me. As with any detector its how well you learn what its telling you, that gives the user the edge.... I use mine with and 8 inch Seasearch coil or horseshoe coil...
No complaints. The rest is how you set it up....It has lots of options.... If rings and coins are your interest it will serve you well. If really small targets, like fine ankle chains, or small crosses, its not the ticket. Small kids rings on up, fine....... I had a lot of PI units I really liked, but like your finding, many of our beaches are loaded with junk, and PI's see it all pretty much. Need a backhoe on a barge around here..... I have a Minelab Sorveign also that hunts the same way but its not water proof at the box. You can make it so but its not how it comes. They claim, its the same as the Excalibur in street clothes, but I do personally find that the case....at least to my ears.....
I use the Sovergin Minelab in wet sand with a wot coil and cover a lot of ground and hunt deep after everyone has hit it. Only problem there is the targets are deep....Bad backs can't take much of that.... When I take my grandson with me, he digs...Long as I can see the top of his head, its not to deep....LOL....... Just kidding.... I sold all my Fishers once i tried the Minelabs out.... Mine are all the older units. I have not tired the new ones out.....
Thats my 2 cents worth.....
George-CT