Purchased February 1st, 2021 from a third party for $185. An amazingly cute hybrid and portable desktop amplifier, with stock JJ E88CC tubes. It has a a hefty build to it with a diecast tube cover and an aluminum / diecast case. I bought this pretty much solely based on the aesthetics.
It has quite a bit of power to it, but I'm unsure how well it powers greedier headphones, as I only have an AKG K702 on hand at the time of writing. It sounds reasonably transparent with no tonal changes I can hear; the harmonic distortions are not particularly prominent.
This amp has a rather high noise floor and is not suitable for sensitive transducers. The experience with my Campfire Andromeda is frankly awful. Even the ATH-MSR7SE has a fairly audible noise floor despite the lower sensitivity. It's probably fine with other high-end headphones though; I don't hear it at all with the AKG K702.
The back is pretty sparse, and only features parallel RCA I/O and a 0-12dB attenuator switch. The charger is a curious 6mm input instead of the usual 5mm. I had to get an adapter since the original power cable didn't come supplied with it.
I haven't done any tube rolling with it (the left tube is remarkably tight and difficult to remove), but there's a rather in-depth review provided by earfonia here, which is also where the post image is sourced from.