Just staggering. If you've ever wanted to make music in a different way, or fancied having a go at modular sound design without breaking the bank, this is a great - and *free* - way of doing so. Support is amazing, the community around it is friendly and astoundingly talented, and it just gets better with every new release. Look up #SunVox on SoundCloud and you'll hear hundreds of amazing tunes made with this one piece of software.
The *only* negative I have to add is that some methods of doing 'normal' things (adding an LFO to a parameter like PWM) are a bit convoluted (create an Oscillator + a SoundToControl mostly and route that to the parameter).
That's literally all. Get it, get into it, and maybe you'll love it as much as I do.