I had one, recently sold it. I rarely play in loud venues, so I never got around to using the anti feedback feature, although it did seem to work when I tested it.
I actually used it as a pre-amp for my Black Mountain Harmonica album. I wouldn't recommend this now though, for desktop recording its hard to go past the Focusrite Scarlett 2i2 ---------- Tony Eyers Australia www.HarmonicaAcademy.com everyone plays...