It works pretty well on my 2500, but that doesn't mean it will be just as good on the ACE but I would expect it to perform OK. The beam or search width is about as wide as your thumbnail and I would expect it works like most coils and gets narrower as it goes deeper. The deepest target I have ever picked up was 7", but I don't think that is typical as it was a very large target. Most likely it would reach about 3 to 4" in the all metal mode. In the descriminate mode, it will only reach about a couple of inches under ideal conditions. It was designed to be used in the pinpoint mode that is actually an all metal mode. It is a bit pricey, but if you are one who does not pinpoint well, it may be worth it. I believe "Uncle Willy" has been testing one and you might want to PM him and see what he has to say. Monty