The interface is simple and very user friendly. You can simply drag and drop elements to create a guitar fx chain, which can of course also be used for any other sort of instrument.
Unfortunately the guitar amps, as well as the various effect pedals all have a rather generic sound. Nothing to write home about really. I'm quite sure that no extensive modelling approach went into these processors, but rather simple standard waveshaping with added EQ. It's not bad, but it's just mediocre. Magix Vandal, which is almost ten years old, sounds much better and so do a range of freeware amps.
I like the included cabinets impulses, as well as the various reverbs and echo effects which I believe are also based on sampled impulse responses.
Unfortnately the developer has turned the product from freeware to payware, which is something I don't like. Could have kept the plugin freeware and released a completely new, overhauled product commercially. Turning freeware into payware is like giving someone a gift and then in a few months demanding money for the same gift you initially handed over for free. Don't do it.