Thanks to everyone's posts on tips and tricks with the coinstrike,I had a good first outing. I started with a sens of 4,neg 25 threshold,99 iron reject, nothing notched. The machine was very stable,and eventually I went with a sens of 5,and a neg 10 threshold. The first thing I noticed,was the machine was very sensitive to low conductivity non ferrous targets.(a good thing at this spot). The next thing I noticed,is that it does like a slightly faster(than cz) sweep speed. The audio sounded "mushy" untill I got the volume of the machine/headphones just right.The tone id isn't as clear as the cz,but it isn't bad. From a spot that I had almost given up on,I pulled three wheaties.(1925,1927,1930) This is a vacant lot I have been pounding with a cz70,f2,f4 for three years. I experienced alot of what I read about theC$. It really does like "round" objects.I pulled a aluminum washer,and a very deep/heavy brass furniture pull,that were missed by the other machines. I was also ready when I got the infamous"51" reading(usuall large/ deep iron). Something I learned today is not only can you check "suspect" targets from 90 degrees,but you can just hit the all metal button and watch/listen to the readout for a better idea of what the target may be. I also tried dropping iron disc to 50,and it was a little to noisy for me. I was getting a jumpy nickel/tab reading,that turned out to be a modern nickel at 4" tilted at 45 degrees.Once again missed by my other machines. I then tried the all metal mode,at a beach volleyball court,and it worked fine (no gold today). I mostly concentrated on sound,if it sounded good and the numbers are more posiyive than neg I dug.I am going to have to learn the different vdi numbers.I am looking forward to seeing what this machine can do. It is a good coin hunter,It has salt mode for the beach(most of my hunting now),and will id targets in all metal mode.(good for my yearly VA civil war relic hunts) Thanks again for everyones tips.