Bill,
Please remember that <b>"performance"</b> can mean different things to different detectorists.
There are some people who look for certain qualities within a detector that they purchase, and depending upon their own level of metal detecting experience, they can quickly determine if a new detector can achieve the type of "performance" they look for.
Some look for depth capabilities, while others are more concerned with target separation and masking (or unmasking) abilities. There are, I am sure, many other performance characteristics that people look for in a detector.
Having that said, I own an ID EDGE. It is my 2nd FISHER detector. I previously owned a CoinStrike, and had categorized it as my trashy spot detector to pick thru the iron & trash. However, those locales are NOT very often encountered by me. My spots typically have targets that are few and far between and depth is the #1 concern. The C$ I had just didn't offer <b>me</b> the depth I needed so I eventually sold it. I have read other reports from C$ users that claim depth was very good for them. However, they rarely state if they hunt in DISC mode or all-metal mode. Personally, I could not stand the all-metal mode of the C$. To each their own.
Enter the ID EDGE.
In my opinion it is a baby brother of the CoinStrike. Not as deep, but it does have some operating features that are better than the C$ and overall more enjoyable to use. Target separation seems to be even better than the C$, but I would have to test them side-by-side to be sure. I believe coin hunters will like this detector more than Civil War detectorists. It does hit hard on coins down to a certain depth limitation in my soils, so any coin shooters will be happy I'm sure.
I will most likely keep this ID EDGE because it is unlike any of my other detectors, somewhat fun to use, and I know sooner or later I will indeed detect in a trashy locale. But the "performance" of the ID EDGE is a question mark in my book.
J in VA