Rust Ride was the very first "bass specific" overdrive I ever bought.
It only does one thing: extreme OD/Dist
The EQ switch is nice. All three EQ settings sound good in their own way. "Warm" was my favorite.
Sounded like it lost some lows to me, maybe it was just the overbearing distorted mids. Not what I expected from a pedal marketed for bass. It would make my bass sound like lead guitar. It was more useful in a blend loop bringing the lows back in and having the extreme distortion on the top end.
Been a few years since having the Rust Ride and I've tried many many more bass overdrives since then so I'm not too sure how much different my perception would be now that I've compared so many others. One things for sure, I've never heard another that sounds like it.
glug glug glug glug: rattle yer brain!