Pffft. Well, they sure do smell like that, I guess... 
Funky? Seems like you've never tried a vintage Morley Power Wah!
Seems like I hit a nerve here, so perhaps I should qualify my statement. I don't like them because:
And going by all the posts on this forum about them, they seem to be somewhat variable in their build quality and factory alignment accuracy. However, they do sound good (when they're not distorting) and I like the additional control you have over the sound.
I tried several of these things, using several basses, and they all distorted. They really should have stuck with the 2x9V batteries. The extreme-ness of the filter is what makes them sound good, but the limitation of the 9V supply causes them to clip too easily. For comparison, the filter section in the old Morleys runs on 55V!!! Clip that filter and you won't care because you'll be bleeding from your ears!

Funky? Seems like you've never tried a vintage Morley Power Wah!
Seems like I hit a nerve here, so perhaps I should qualify my statement. I don't like them because:
- you can't leave it set mid-sweep (deal breaker)
- they distort very easily in my experience
And going by all the posts on this forum about them, they seem to be somewhat variable in their build quality and factory alignment accuracy. However, they do sound good (when they're not distorting) and I like the additional control you have over the sound.
I tried several of these things, using several basses, and they all distorted. They really should have stuck with the 2x9V batteries. The extreme-ness of the filter is what makes them sound good, but the limitation of the 9V supply causes them to clip too easily. For comparison, the filter section in the old Morleys runs on 55V!!! Clip that filter and you won't care because you'll be bleeding from your ears!