My 2/10ths of a cent on the sonzera 20.
1) on the clean channel, to my ears, the guitars that sound good through it sound great. Not all of my guitars work through it. Notably my HBII and my 408. Can’t get happy with the sounds; even with a good eq pedal. As hollowbodys go, my Eastman 372 sounds great through it. As does the silver sky. Those two seem built for each other.
2) the reverb sounds great, but it’s pretty subtle. That works well for me. However, if you want to go underwater you’ll need additional reverb
3) i don’t use the drive channel all that much, but for as a boosted clean, it works great, even with the two guitars that don’t work, for me, in the clean channel
4) channels makes a loud pop. I discussed this with PRS support, and sent them recordings. They indicated that the pop was normal. At the end of the day it doesn’t impact me. However, if you’re switching channels mid tune in a performance, I can see it being very problematic. Something to keep in mind.
All said, I think the amp is an awesome value for money! But it does have its issues