As soon as I tried it, it sounded great. And then I figured out my speaker cable was actually broken a bit. So after the replacement... oh my god...
The sound is amazing, transparent and natural! It does everything as advertised, or even better than can be seen on the demos. The analog speaker simulation is just incredible. But it does take a bit time/skill to set up, however it is worth investing your time in. And the possibilities are endless!
Built like a tank, plus it barely heats up even after attenuating 40W of tube power for some time.
So far I used it with my Fender Bandmaster VM and Blackstar HT1R, as an attenuator, and as a speaker load (with eq sim, and with 3rd party impulses). I must say, probably the best piece of gear I ever bought.
Oh yeah, Thommann was great with shipping, tracking and general support, so thumbs up for them!
If you have any tube amp at home, get this.. and rock like you've never rocked before \m/ !!!