Simply fantastic! You get 4 modules in one, which saves a lot of space on your rack. I especially like the sample and hold section, which lets you use both external and internal signals (no patching required). The S&H has its own internal clock too, which is really awesome. The LFO is nice too, it can go quite slow on the lowest settings, has 5 waveforms and an additional inverted output. The noise generators and ring modulator are alright; basic, but what else do you need? Nice to have two outputs for each noise type, too.
The module itself looks gorgeous. I love the System 100m aesthetic, the color is classy, the S&H clock and LFO have nice green diodes indicating the speed/frequency, and the four sliders emanate bright red light constantly. Looks great, works great, the price is great, no complains at all. I absolutely love it!