"The Opus might not displace your Helix, Fractal, Kemper or Quad Cortex, but it offers a lot of good-sounding emulation in a compact and usable package at a fraction of the price": Two Notes Opus Amp Sim and IR Loader Unit review
There’s a lot of sound and even more flexibility in this little box, and it should prove to be exactly what many guitarists are looking for
Source: guitarplayer.com