For FBS detectors in general:
*Unique 2D discrimination which allows you to walk right past round rusty iron targets (steel bottle caps, etc) which sound good on other detectors.
*Accurate Target ID - even on deeper targets where most other detectors tend to get "iffy".
*Accurate depth meter with numeric read out (CTX). Much better than the depth arrows or symbols found on some detectors.
*Hits deep silver with an unmistakable tone. Once you've heard it, you remember it.
To sum it up, FBS detectors like the Etrac and CTX give a lot of information about the target pre-dig. This information tends to be pretty dang accurate too. So once a user is able to master putting all that info together (tone, depth, ID, and a good understanding of FE-CO discrimination), he is able to cherry pick good targets like nobody's business... even from the trashiest places. For these reasons I feel that FBS is outstanding for coin shooting, hunting on time limited permissions, hunting permissions where you have to be careful about appearance (well kept lawns where you can't dig a hundred holes), and for those of us who simply aren't able to "dig it all" anymore due to health reasons such as worn out knees or spine problems.
There are plenty of faster detectors that will see targets that FBS may miss.. but I've yet to find a machine that can match them for cherry picking or coin shooting.