The tone of my Bass Big Muff is definitely solid compared to the Sovtek muffs I've tried. Maybe a loss of warmth, but I would say it's at least 90% there. The tonal versatility they added with the bass boost/normal/clean is really nice. To me, what that does is basically three different ways to retain your low end. You can put the bass boost on and not have to worry about it, go to normal and put the tone knob lower for that classic heavy/doom sound or go to the clean sound, which sounds to me like an exact 50/50 of the clean and fuzz tones. So yeah, I like it a lot, obviously the Deluxe version gives you a few more options, but for the regular BBM being under 100 bucks, it shreds.