If you're a tone junkie but having to make do without a collection of boutique amps, this is a great piece of software. I've been pretty dismayed at the generic offerings from the big players (amplitude, NI, Line 6, etc) so was intrigued when I discovered Positive Grid. The sheer subtle, customisability of each stage of the amp circuit is mind boggling and really enables the dialling in of a bespoke, personalised tone. Its a remarkable piece of coding and feels very responsive to play through. I have the standard version and am desperate for the next deal they do to upgrade to pro to take advantage of their full range of speaker impulse responses! I've this working across a wide variety of styles and guitars. A+