I just picked up a used one, and I got a copy of the book on it, by Clive James Clynick. I have used it twice. It is a large coil to swing, and I got a straight shaft for it, I prefer staright shafts. I use it for wet sand, chest deep water (potentially, hasn't happened yet). Had a great time with it at one beach, drove me bonkers at another. From reading the book, and my two experiences, it seems one of the keys, is learning to set it up properly, and then 2 is getting enough experience so that your ears can start to tell the difference between good and bad targets. I don't usually mind digging at beaches, but the second trip out with it, the beach turned out to be infested with pieces of lobster traps, sparklers, foil, and the usual allotment of pull tabs, beavertails, and pull rings. I think I recovered more than 75 pieces of trash to 3 pennies, and a nickel. The guy I had met there, got a mens gold wedding band with his CTX3030. I finally got so frustrated I went back to the Excal after 3 hours. I do believe the pulse unit can be superior to all other types of detectors at the salt water beaches, but there is a lot of time put in to get there, just my humble opinion. I would resell the pulse, but I am kinda a mule, and hate to give up on things. The Excal has certainly not been replaced. The book does explain a lot of the factors, if you decide to get the Dual Field. Artie