Yes, Mirko is great to work with.
I'm currently auditioning some of the FM3 ambient presets through my ELIS.8 speakers. Switching to UltraRes adds a nice sheen and openness to the guitar through them, and, as I switched around between presets I always thought they really represent the sound of the guitar nicely. I'm currently using a PRS 509, and in both single coil and humbucker mode, every pickup has a nice and clear voice. They're just right.
About a week ago I had the opportunity to really turn them up and was messing with presets with the Plexi 50 Watt and Trainwreck Express, and they definitely hold their own.
I'm very happy with them, and would definitely buy them again.