Feature:
It features exactly what they said it will. No EQ -- just gain/volume and two notch filters that WORK, plus a phase inverter switch that give you even more control over feedback.
Quality:
Seems very well made and road worthy.
Value:
What are you waiting for? If you have bad feedback issues, GET THIS! Totally worth $100.
Desirability:
Don't let excessive feedback ruin your gig. If you play an acoustic instrument (any), this will save your nerves. A must in the tool bag for any serious acoustic instrument player. I got it for Upright Bass (works great). I've also used it for acoustic guitar, resonator and ukulele. Works great on all of them.
Sound:
The sound is excellent. If you add more gain, you'll get more noise, but that's true of any pre-amp.
Ease of Use:
Easy - just plug in, turn up JUST UNTIL you start to hear feedback. Then, turn the first notch filter until it goes away. Then continue to turn up until second feedback frequency occurs. Do the same with second noth filter.
Support:
Don't know, but I hear they're easy to deal with.
Overall:
It works as advertised. I'm happy with it.
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