I have had one of the new 3D's for a few weeks now, and I love it...
If you have ever used any of the CZ's it is basically the same machine, other than the enhanced mode... It seems to High-tone more targets then the average machine. I have found this to be good in one way, as it is supposed to high-tone some of the older gold coins, and older metal in general, and it does seem to like the odd ball targets... I have found several rings, little charms, silver coins, & my first buffalo & Victory nickles...All rang in at a high-tone at different Depth's, & ID'ed pretty close most of the time...
Never have used it on a beach, so I can't help ya there, but as far as inland soil go's ( Indiana ),,, it definitely will detect as deep & accurate as any I have used...
Good Luck & Happy Hunting~