I used to play in a blues band and we would do Born Under a Bad Sign. It was kind of my take on it, and I transposed it to D, kind of liked it in that key, not that it doesn't sound good in just about every key. I used to get away with using a pretty dirty tone on that one, though the singer in my band always wanted me to play it with a phase shifter. Some funky variations.
Unfortunately I only have crappy computer speakers to listen on that I'm sure don't give a good representation of the bass tone, but what I do hear is solid, and I know the Lo Tone gives a real solid tone, very warm and fat. I also get some more aggressive tones out of the Lo Tone too, especially with my Gibson SG Bass. I did some clips of the sounds I get with the Lo Tone if you'd be curious to check them out. Here's what I get with a Jazz Bass:
Frantone Lo Tone Classic Fuzz SOUNDCLIPS
And then the heavier tones I get with my SG Bass's bridge pickup:
Frantone Lo Tone Classic Fuzz SOUNDCLIPS PART2 (w/ aggressive, yes, aggressive tones)
And I even did a soundclip with a bass wah that I rather liked how it turned out here:
MORE Wilson Effects 12 Position Bass Q Wah SOUNDCLIPS
Really crunchy in a funky way I think. Of course I generally keep the fuzz cranked on the Lo Tone, I like it full bore, but it does a good range of sounds depending on where you set it and how you play. Definitely more versatile than some of the other fuzzes I've had.