It does its job very well on my home stereo setup. The audio quality is good, it doesn't add noticeable noise on my analog path. I don't mind the divided-by-five scale printed on the front panel of a 6/12 dB device. Someone might, but it's done by ear and experiment rather than by numbers, right? I haven't had a need or opportunity to test the feedback detection feature.
The shallow depth of the unit may be a plus, or a minus if you want to stack your equipment without a proper rack mount.
The only real issue I have is that if you remove the rack mount brackets, that reveals gaping openings on the sides of the front part. It's not a deal breaker for me, but all-enclosing side panels would be appropriate.