Just downloaded the demo today, will play around with it tomorrow.
It’s actually not bad, but you have to make some adjustments to their default setting to get the CPU usage down to a reasonable level. For instance, even if you are only using a single amp/cab routing, the double and triple amp/cabs are enabled by default in the background. You have to go into those routings and bypass the amps/cabs you won’t be using. Then you’ll see a lot of that bloat disappear.