Good, very flexible (guitar) overdrive / distortion pedal, on the one hand it continues, where the also excellent TS-999 or TSB-1 (some sort of slightly hot-rodded, sonically more flexible boutique TS based pedal plugins) end, on the other hand it sonically also reminds me a little bit of an OCD, if properly adjusted, but has enough gain reserves to work equally well as distortion or high-gain Metal pedal.
As I have not found a convincingly sounding OCD based pedal plugin up to now, I prefer using the ProF.E.T. for these sort of tones. Gives a nice dynamic reaction to attack, offers a good harmonics reproduction, more than enough dirt and power and also the four-band eq does a good job for adding more depth and low end rumble and / or more treble bite.
A reviewer complained about the harshness, I personally think, this is depending on the signal chain, a pedal like this one should be placed in front of an amplifier, it will not produce so convincing results if it is positioned behind an amp or as mastering saturation effect. But I also found it in combination with some amps sounding too harsh, with other ones exactly this "harshness" resulted in a convincing harmonics reproduction, but also a different cabinet IR can change the final sound impression a lot, so the whole signal chain is some sort of interactive system, also a pedal like this one will not sound very convincing at too high gain settings and in front of an already heavily distorting high gain channel. In combination with a clean or crunch channel it works best in my opinion.
Also sounds good without an amp plugin or only combined with a power amp (eg. the still excellently sounding TPA-1) just with a cabinet IR behind.
Excellent plugin, not only because it is freeware.