What first strikes you about harmless is it's user interface wich looks deceptivly simple , the signal path is arranged from top to bottom starting with the harmonic content and ending with the effects output. The timbre section (right click) let's you analyze imported single cycle waves wich are then shaped by a frequency mask , then gets filtered by a handsome arrange of filtertypes.
The unison is complemented with a good balance between cpu power and voice number settings and parameters like detune can be modulated with keyvelocity.
next stage is the phaser section wich doesnt work as a conventional effect but rather works with the masked harmonics themselves (kind more like a frequency shifter), this gives the effect a lot more detail than you would expect from a normal phaser.
We only have one main lfo wich is a bit sparse although the vibrato in the pitch section works independent , this is the one section of the instrument that could use a bit more scope.
The effects section at the bottom rack provides all the tools you need to give the sounds more spaciousness . All in all harmless is a truly exceptional vsti , the soundquality is really superb and detailed , it oozes warm tones wich are normally not associated with this kind of synthesis , it's range crosses early synclavier /ppg mixed with a striking modern organic quality , top marks all the way