It's a great mixture of vintage and modern. The preamp and audio path is very similar to the legendary Shi-ne Univibe, but the highly tweakable waveform generator takes it to another place again.
The unit is extremely versitile. It has univibe, vibrato and tremolo modes, produces pulse and sine waveforms, has three speed ranges for each, with adjustable waveform bias and symmetry controls with a large output boost available too. The rate control is an illuminated pot which describes the speed and shape of the device.