I've been seeing advertisements for this (kickport) thing everywhere.

http://store.drumbum.com/skuA-208.html


Does anybody here use one of these? Have you tried one in a store or anything? I am skeptical whether this little piece of plastic will really improve the sound of my drum enough for me to be okay with dropping $40 for it... I don't doubt it may improve the sound a little bit, but the advertisements guarantee a huge increase in low end sound.
I have read some of the reviews on MF, but they are 50/50. One person will say they love it, another will say their drum sounds better without it.