On the Internet, it is hard to find an in-depth analysis of this device. I bought it under the assumption that I would test it on my own and return it as a last resort. So starting from the beginning:
1. speakers- the quality of the speakers is very good. they play a wide spectrum, when connected to a computer via usb and using the built-in equalizer you can get very good sound quality. you can also use it successfully as a boombox on bluetooth- here a lot depends on the codec the phone supports. The amp itself does not support atpx hd. Many reviews on the web assess that the sound is muddy but it is a matter of connecting with the wrong codec or poor equalization.
2. the quality of simulation of amplifiers and drives- from the amplifier you can get great sounds. Some very great. The problem is that most simulations completely do not reflect the "real" effects on which they were modeled. When we read "brit 800" or "screamer" we know more or less what to expect, but this amp does not offer us that. The sounds do not correspond to the names. There are also some simulations from which I didn't manage to get a good sound at all. In addition, the parameters of overdrives and amps do not work as we are used to - master volume does not "drive the tubes", but only controls the volume. The "presence" potentiometer often has to be turned up to 80% for the sound not to be muddled. HOWEVER, if you take the time to learn how the knobs work + with the help of an equalizer, you can get some really really great results.
3. amp cabinets simulations - built-in simulations are weak. however, we can upload our own. the first better IR response from the Internet on the v30 and sm37 / r121 microphones and the sound becomes 300% better.
4. application from the manufacturer is ok, 100 times better than THR, it is stable and does not break. However, the real claw of the amp shows when using the fan app mightier amp. There is the possibility to save an infinite number of presets, plug in a bluetooth midi footswitch to control whatever you want (switching presets or turning effects on and off).
5. additional functionalities such as drum-machine, looper work great, the amp is richly equipped (wireless system, footswitch).
The amplifier was cross-checked with a Yamaha THR30II and I think it wins over it in every possible way (except for the intuitiveness of sounding cranking on specific simulations)
my final rating is 8/10. if the simulation knobs behaved in an intuitive way and the names given by the manufacturer to the effects reflected the originals I would give 10/10