I just got my new and calibrated CZ3D in the mail today. It's a deepie for sure. I tested it out on two targets I have buried at the local park. Both dimes are down 9+ inches and the CZ3D matched my CTX3030. The CTX barely reads them and the CZ3D does the same. It's tough, iron infested ground. I'm really happy I went with an air tested and calibrated model instead of ordering one blind!