Just picked one up yesterday.
I'm still trying different settings out, but so far, I'm very impressed. It is really well built, and sounds and feels great. I'm more of an overdrive guy typically, but this is a lot of fun to play through. Solos and riffs really sing through there, and sustain beautifully. It would take up a good bit of space on the pedal board, and uses it's own power supply. But it's a good pedal IMO.
Now I'm curious about the Radial London Bones distortion, and how it would compare. It doesn't have a tube, nor as many tone adjustments, but is much smaller and runs off of 9v.
I had the Hot British (almost the same pedal) and loved it. However it was later supplanted by the Wampler Pinnacle II by a very slim margin. To it's credit, the Hot British has the most flexible EQ of any distortion pedal on the market.