I bought the 350 Ace with DD coil brand new last month. I also bought at the same time the Sea Hunter Mark II. I live on the beach in SW Florida. I bought the 350 Ace with the Garrett Pinpointer for $400. It is great in the sand, but it is horrible in the wet sand unless you put the sensitivity down to like zero, because the salt water and mineralization does so many false readings. It is literally ALWAYS beeping. It is great in the DRY sand. The thing I like best about the 350 is you can notch out (discriminate out) whatever you don't want to dig. The first two notches are IRON, which the beach I live on is full of iron. I have used it over the past month about 10 times I spend everyday in the water with the Sea Hunter. I am honestly going to sell the 350 and upgrade to the Minelab Sovereign GT which can go in shallow salt water. Garrett says the 350 can go in shallow salt water, unless I am missing something it can't. However the 350 can go down at least a foot or more. It shows only 8" on the display, but I found a copper bracelet with cz's in it about 16" deep in dry white sand. I also found a 925 Italian Steling Silver quartz cross pendent about a foot down. Neither one of these items are worth much, but it will find stuff. What I do like is the option to use headphones or not. I honestly have not even taken the headphones out of the package. The Sea Hunter you have to wear headphones. The 350 is very light. It is better than a beginner detector and the best in the series. Don't buy the AT Pro it's twice as much and it does the same false readings in salt water. If you are just going to do sand beaches the 350 Ace with DD's is fantastic with the audible speaker and digital display. It's just the hot sand on my feet I don't like. Also the Garrett Pinpointer is a must for the dry sand, but is useless in the wet sand. If anyone is interested in the ACE 350 bought in January and the Garrett Pinpointer I will sell them for $300 plus free shipping. That's $100 off what I paid for them both last month. It still has the original box and manuals and dvd.