Maton Feedback Buster Mini Maton

Pros:
Kills feedback
Reduces sound by about 30%

Cons:
Price
Lots of little bits of rubber that never were trimmed off
Cosmetic blemishes in the surface from manufacturing when seen closeup

Expensive, but does the job and looks ok from a distance. Was too large for my Baby Taylor BT1(e).

I am very satisfied with Maton Feedback Buster Mini Maton, it serves me well in live format with my Mini Maton guitar. It sits well in the sound hole, it's firm and doesn't move around. The price is a bit too high compared to other feedback busters, but it's specific size so there is not many products to choose from. The Maton Feedback Buster passed quality test when my dog stole it away from me - he did chew on it for while but did not do any damage :)

I use a lot of effects with my acoustic and this thing is a must.
also somehow it gives the pickup a warmer sound :)
A must if you perform live!
Pros; no feedback!
Cons: None