Reading a few negative and some 'ok ok' reviews here, I wondered why would anyone want to use this as a gig amp or even as a standalone practice amp. For such requirements, you can always go for something from Blackstar, Boss Katana, Vox, Fender, etc.
This here is actually a beast which is a boon for that guitarist who uses amp modelers and high end processors (which have amp modelers / preamp models). You see, this amp has a very translucent sound, which they've described correctly. It doesn't have its own tone. So, if you want a faithful reproduction of your amp models from your amp modeler (whether it is a Helix, Zoom, BOSS, Headrush, AxeFX, Kemper or even iRig or desktop amp sims), this will do a plain good job. Having no colour of its own, it will faithfully produce what you want it to.
It works very much like a powered speaker or a power amplifier. And boy, has it got some power. For practice purposes, dialing in master volume between 1 and 2 is more than enough for my amp modeler. If I use iRig for my iPad, I dial between 2 and 3. For jamming, I just increase the volume by 2 or 3 points. It recaptures all the effects and amp models of my processor brilliantly.
What it is not - It is certainly not an amp you'd want to connect your pedalboard with (if it doesn't have any preamps or amp modelers) or use it standalone as a practice amp. No, it is certainly not intended for that. Also, while I mentioned, it is great for bedroom practice as well as jamming, for gigging, you'll certainly need more wattage.
There are some challenges, like the power button is very noisy and there is a loud thump when I switch it on and off (maybe it's a quality control issue). But apart from that it's a crystal clear amplispeaker. Brilliant in everything it does.
Overall, I would recommend it to late beginners / intermediate players who have a good amp modeler with them and want to reproduce a faithful emulation of their favorite amp models.