I'm a long time detectorest. Started out with a discovery 5500. Had a F75 and Tesoro Tiger shark, Traded them in for a ETrac when they first came out. I havent looked back since. The Tiger was a good machine and found the small shallow gold. It just didnt do well on depth and falsing. The ETrac has been my do all machine. Silver in the parks and gold/plat on the beaches here. Making enough finds to pay for the ET twice in the last year. Both beach and parks, I really wanted a dedicated water machine to use in the surf/wet salt sand. I picked up a used but new "built this year" CZ-21" for a great price. While the ET is great at selective hunting in the dry sand and did well in the wet. The CZ runs away in rock solid performance. Sens set at 10 this thing was having me dig deeper than i ever had with the ET in the wet salt sand, Solid hits and easy to use. Although more trash was dug i feel this machine was made for this environment. This thing just hammers the deep stuff with more gas to go. Solid, deep and stable! Did i mention Stable??? I was running my sens at 10 on the wet salt sand and not even a peep of falseing. Deep? 3 full scoops on a pull tab WTH? The ET struggles on the wet salt sand to PP a deep target. Not the CZ.