I just purchased an Ace 350. I will say I am very impressed with the performance. I have used quite a few different detectors, White's, Fisher, and Garrett. I believe the Ace 350 will match anything out as far has finding coins. I have gone to several sights I have visited in the past with various other machines. I was very impressed with the coins the Ace 350 pick up that the others had missed, but I realize you will never find all the coins on one outing. But when you find 18 to 28 more coins then, this is a realization there is something to this Ace 350. I think Garrett has a real winner with this machine. I also have used the AT Pro, I think I like the Ace 350 over the AT Pro. anyway that is just my opinion, which are dime a doze.