I think the
Feedback Ferret is one of the better automatic
feedback solutions along with the Sabine products and these can be a great tool in certain applications, but it is just a tool and is often not the first one to try. Any automatic
feedback solution works best when applied to a particular mic/
speaker pairing, when you apply them to multiple mics or multiple speakers then they affect them all. For example, it is pretty common to have someone put one of these on the
console's main output or a
monitor send, but that means that any equalization or processing applied affects all the sources and not just the one or two causing the problem.
They can be a good solution for
portable systems or situation where you don't always have the opportunity to really setup the
system as much as desired. And they can work well as a "
safety" with less experienced operators or people unfamiliar with the
system. But I would typically not plan on them as a regular part of the processing and more as something that may be available if needed.