I installed it about a week ago, but I've had lots of problems with it just stopping (ie no sound at all even though it's loaded and the volume is set).
My guess is, it's because I've been playing with it on my workstation, which, since I'm a programmer, I pretty much club to death on a daily basis running virtual machines, VPNs, test code, installs/uninstalls etc.
So, I'm going to have to wait till I get my juke running to properly evaluate it.
I will say this though. When it worked, it did seem to make the sound much better.
Hmm, Put it my Mame cab? Interesting. The volume does fluctuate quite a bit from game to game....
I need to try that!