I've used one (I don't own one) and it does the job it's suppose to do - although I did have some problems controlling it at higher volume. They do seem a little too pricey. I actually prefer to use a Peavey KB60 (sesigned as a keyboard amp). It has a 12" and a tweater - so it can get the bootom of the accoustic tone while still capturing the highs of the strings.
