Well, the Bass-Drive has fallen "out of vogue" here on TB... So be prepared for that.
The Bass-Drive Mosfet is still my go-to bass overdrive both live and in the studio. And I have options & have been through MANY od pedals! It has a great, classic tube screamer vibe, is touch sensitive, flexible and road worthy (I've only needed one knob repair in 10 years of heavy touring). It does have its' ceveats, however...
As it is tube screamer based, the pedal adds lots of mids. It doesn't 'kill' a lot of low end (as many will soon post), but the net effect of the extra mids raises volume & thus- you will probably turn it down (along with the lows)! The boost function and comp cut also change the gain makeup, so you have to be prepared to tweak to compensate.
The Mosfet version has a much better low end & the 'flat mids' setting helps a lot as well, so make sure to get the newer versions!
I should note that I now always use an Xotic X-Blender with my Fulltone. It allows me way more flexibility, the ability to dial in more lows at 'unity volume', etc. Still, in a rock context, the Bass-Drive can be a venerable stand-alone od!
There are so many of these on the market, I would think you can get one used for close to half retail. (guessing)
Anyone digging the Fulltone Bass-Drive sound really should also audition an Xotic BB Preamp. Same inherent tubescreamer tone, easier to dial-in low end & a smaller pedal! I keep one around for when I need to 'travel light'.