Well, it turned up this afternoon, and I've only plugged it into my Scarlett interface and on to my hifi so it's not a real test yet...
It's built like a tank (it's the size of two regular pedals side-by-side) and case and knobs look great in the flesh, along with having a nice arrow marker and numbers to set your levels accurately. Apart from the two volumes and drive pots, the rest have a centre detent that makes it super easy to find the middle setting. The ability to select what the bypass/mute button does is great, as is the selection of the tube or FET or both. Sounds-wise as I said I haven't done a full test, but the range of adjustment is good, though I had to play with the treble knob a lot to realise it's actually quite suble in its effect (I only really noticed it with my passive fretless bass tone control at max treble and doing full sweeps of the treble knob on the preamp. The rest though have noticable effects to the sound and it feels quite close to the John East preamp (got one in a Hohner Jack bass) in range. I want to plug it into my main bass amp to see what it does. The surprise was the Tilt knob, which the Andertons video review questioned a little, but if you want a quick change to the sound it can have a massive effect with little movement and I think it's a handy thing to have, I liked the sounds it was making.
Seems from the manual that this will happily split to a second unit to connect to another amp or preamp via the Link connection, which feeds the dry signal back out again. I haven't tried an active amp yet or FX. One thing I'd forgotten from the review, it doesn't come with a power transformer, so I had to scrabble to find my Boss one which seems to work fine.
For now I'm happy with what I've heard, but I'll have a better experiement with it later today.