It's basd$$. That and the C4 are the only envelope filter/synthy pedals that is in my pedalboard. People often says the orig Mutron III is the best ever. I own one and owned the Arp version, the BEF Pro runs circles around both. My opinion of course. If you play more than one bass live, it's difficult to get the Mutron III to react the same. BEF Pro has an auto threshold function to smooth that out. Plus, the EQ can totally change the sound, not to mention the availability of saving 6 presets. This opinion is coming from a guy who currently owns 32 envelope filters...don't fall for the narrative of it sounds "digital," because it sounds great. After all these years, I can't tell the difference between analog or a digital envelope filter...if it sounds good, it sounds good. Also, don't chase Bootsy's sound, you'll never sound like Bootsy.