Just chiming in...
I've got one. It's outstanding. As far as I'm concerned, it brings out every last drop of what your front end is trying to do without giving notice of itself. I was just going out of my D70s DAC as a pre or (alternately) out of my Creek Integrated pre outs into a Goldnote PA10. Sounded ok...but bringing in the Elector was a serious game changer. everything was more present, nuanced, dynamic, balanced, staged wider/deeper in all directions, but without ever becoming obtrusive or distracting. You get more out of the music without it making itself known. I mean, yes. not state of the art, but I don't feel I need to spend on state of the art with this amp. No problem with gain for me, and I'm using some fairly inefficient speakers. Not to say that I wouldn't like a bit more as some tracks I do have to get up to the 12 o'clock zone on the knob. But literally no stress from my amp or speakers whenever I felt the need to push past and rock out.
Excellent components and connectors, discrete all the way (from what I could gather). Case is so-so. I would say that it's for those looking for qualities found in a passive pre, but with enough gain to maintain flexibility and bring superb balance to whatever you want to use before and after it.