My wife bought this for me, very pleased with it though I've only had an hour to try it out so far.
Built by a dude called BK Butler in the States, it sounds great in front of my new amp's clean channel with the Strat. More experimentation to come, and hopefully some clips soon if I can cart all my crap to my folks' place (they have a big empty room to crank stuff in) and get some recording done.
Mr Butler tossed in a NOS 12AX7 of some sort as part of a Christmas special he was running, and the Bias knob on the back let's you choose how hot to run it, which is pretty cool.
It's about as far away from a transparent drive pedal as you can get: it adds lots of very distinct colour, but it's colour I really like so hooray ?