Well... I received the pedal today and I have to say I am not disappointed, it does deliver a tighter more metal tone than does my Maxon od808. I did A/B them against one another directly going back and forth listening to the nuances. Here's what I heard in the short time spent with it...
The Savage Drive has more gain adjusted at straight up noon than the Maxon does maxed out but we knew that... The savage drive excels at getting a tighter tone with more clarity how I had it set with the dirt and volume at straight up noon, I 'm sure I could dirty up some more with the dirt to grind some more like the Maxon(how much more I'm not sure, with the Burr Brown OPAMP chip which the Savage drive uses which is a HI-FI clarity chip when compared to the Maxon JRC4558).
I'm still goofin with the Bite and Tight knobs but it seems very adjustable and I am sure I could tweak it to replicate my Maxon but I wanted the Savage to be different and tighter and it is.
Now the Maxon was warmer and seemed to have more grind to it but less gain and seemingly less clarity because it was warmer/softer attack but that's what the JRC4558 chip does well. I played them both into my Cameron Inspired Jose modded JCM800 combo with EL34's at lower volume levels.
I can see why this pedal is popular with the all out Metal detuned guys with Recto's and such which is what this pedal is marketed to. I still like my Maxon OD808 for Classic Hard rock ala Badlands/80's rock and won't be selling it but if you need to push your amp with substantially more gain with a tighter response and more clarity the Savage Drive delivers.