I used an AT Pro for a year and only dug a few nickels as I was tired of digging trash.
I then used my CTX for a year and it bangs nickles HARD. So- I dig every nickel signal I get and have found a lot.
I have almost filled a mason jar with nickles in that time. I have benefited by getting several buffalo, and recently a war nickle.
I was also surprised to dig a solid nickle signal on it a couple months ago and found a gold ring.
As already said- the smear and splatter are priceless. The dancing horizontal on a nickel / other coin combo is nice too. On a lesser detector it would be jumping back and forth for both a trash item, or mulitple coins who knows. The CTX would know...
Not going to lie- as much as the Nox multi freq should be good and seems like a great upgrade from say an At Pro, I don't know if I can give up the info the screen shows me on the CTX. Seems more trash will still be dug. Time will tell I suppose.