I use mooer pre-amps instead of amps on my pedalboard. I use Regal Tone and UK Gold, together with Moeer Radar impulse response unit.
Both units sound great, very convincing with benefits and drawbacks of corresponding amplifiers. Design is very well thought of, you have two channels to switch on the fly, and the ability to switch cabinet sim on and off easily.
However, quality seems to be very problematic.
Both UK Gold and Mooer Radar crapped out within 6 months of purchase, with very light use, using their own power supply. They both just suddenly started producing digital hiss and skreeching noise. My rig is otherwise powered with Palmer and Dunlop PSUs with regulated outputs, so I dont think some other device cause this.
Shame, great concept and sound, but I cannot fully rely on it. Not gigging for now though, so I did buy another one, fingers crossed.