Love it. Far superior to my ears than the Emma Discumbobulator, which is the cat's-ass envelope filter among all the Mogami-cable-using corksniffers out there. I completely agree. The Emma has a wider range, but doesn't sound as chewy and organic as the AF-9. I think the trend with envelope filter users is over-the-top funkiness and control over the parameters at the expense of tone. I've owned an AF-9 for about 8 years now, and my previous frame of reference for envelope filters were the boss units like the dynamic filter, t-wah, etc. The AF-9 blew them all away. Since then, I've tried the Emma, Pigtonix, old MXR filter and several others. All came and went. Even if I get my grubby hands on a vintage Mutron III, the holy grail for me, I would still keep the AF-9. BTW, I saw a video of Stevie Wonder with the old Boss Dynamic filter on his keyboard. He sounded good with it-maybe I'll send him an AF-9.