I ended up getting the desktop version of this. What a fantastic sounding synth!
Don't let the size fool you. The thing is only a little bigger than one of the Roland Boutique units (roughly the width of two large pedals side by side), except instead of tiny little controls that irritate you, the knobs are ample sized and feel good. The chassis is metal and I haven't had such a small synth with such good build quality before.
Also, don't let a single oscillator put you off. Remember how good the classic Roland Junos and Korg PolySix sound with a single oscillator? This has that magic, maybe even better. I know it may seem weird to compare a ladder filter synth to those, but if you watch some videos on this I think you'll see I'm not the only one that believes this is the true successor to the great sounding single-oscillator synths of the 80s. I'm normally not a ladder-filter or "saturated Moog sound" guy, but this is such a clean and musically useful implementation that the comparison to vintage Roland and Korg synths can't be avoided.
And the Chorus FX on it, while it is digital (that only means you'll hear some aliasing if turning the knob in real-time which is not how most people use chorus anyway), is fantastic and enhances the single oscillator in a way that doesn't leave you wanting a second OSC.
I heard folks with the E7 say the Chorus wasn't impressive... I think Guido at ES Music went out of his way to make sure that's not the case here, I think this may be the best chorus I've heard on any modern synth. If you watch videos of folks turning up the chorus against that already amazing sounding single oscillator, you'll notice it invokes a mandatory human reaction (and there's a reason for that.. its just, wow).... Guido did mention improvement to the FX in some trade show videos over the E7, so I think he is a very understated guy

. It's a single knob, but it has such as range on it that makes that irrelevant -- and the display showing what's going on is a fantastic plus.
The delay is special too... turned all the way to minimal setting (7.85ms), it doesn't even sound like a delay or even approaching a typical slap back, it just does what I would call summing amplification of the sound, fattening it and giving it weight. If you want that single oscillator beefier but still musical and standing out in the mix, try that. Then the delay feedback can provide this metallic quality if you want it... really superb, and also sounds great as you turn it up to just do what a delay normally does.
Possibly one of the best features is the lack thereof. The simple workflow of the thing and the fact it's one big sweet spot oozing with vintage tone that you can't really go wrong with no matter how you turn the knobs is what will make it a legendary instrument.
Bass, strings, pads, brass, plucks, it does it all, and it just sounds top-tier.
Not too many things to get in your way, just an instrument that gives you an infinite amount of musically useful synth tone, and just inspires you to play it every time you hear the sounds coming out of it.
Highly recommend. Yes, its well worth $1k USD. There is nothing else with 6 voice polyphony, at this particular price point, that I'm aware of that even comes close to the sound that comes from this little box. It's what you want in an analog synth.