When I read that this plugin is supposed to be an emulation of solid state amps from Crate, I was a bit skeptical, because I had an amp from Crate when I started like 25 years ago and it sounded horrible.
After giving it a test run I must say that in this case digital sounds definitely better than analog, at least better than my first amp. It models three amp types, has three gain stages, a reverb and ambience effect and also a cab simulation which is not standard in the world of freeware amps sims. The GUI is, as always with AXP, not some 3D rendered simulation of the hardware which make no sense in the digital realm but a carefully crafted, very usable design with a logical layout, not too small and not too big. A real pleasure.
Playing with a Les Paul type guitar, I find that the 90's amp is better suited for clean playing as is has more twang in the high end, and the 2000's emulation seem better suited for distortion and hi gain sound, but this might probably be different with another guitar or playing style.
AXP has set up his own niche with his solid state emulations, as if to prove that with all these all tube guitar emulations around, transistors still have a reason to exist, and he delivers. Flextron is arguably the culmination of the previous efforts.
Hey, thanks for the feedback. There are some specific components that are CPU-hungry, namely the Ambience control - set it to zero and see if it helps. Also reduce oversampling (4x is enough most of the time). There are some cases when the Speaker Sim and Spring Reverb could cause CPU spikes, we are currently discussing it in the support thread: http://www.kvraudio.com/forum/viewtopic.php?t=417324.
I like it too. I compared the cab sim section to Nadir+Kalthallen IR trying to replace the cab sim section with something else. Altough some alternatives came up I find that the original sound really stand its own. Great set and forget tone.