I have never seen one of these, let alone auditioned it... but the youtube link provided by Durham makes it seem very appealing.
Lately I have been stocking up on clean boosts and overdrives and have become enamored of two:
Xotic EP Booster, and Phat Tone by Carson Lane FX.
The Xotic is very, very clean with some added low end, and sounds a lot like this Sexdrive. The Phat Tone definitely has some grit in it, but not to the point I would call it an overdrive. I named mine True Grit, and I think Mike Stephens at Carson Lane is going to adopt that name for it.
Neither of them muck up your sound.
Happy hunting!
(Message edited by Benson_Murrensun on February 15, 2011)