As pretty much everyone is suggesting, this filter is really unique. I find it most interesting when used as a low-pass, though it works great as a high-pass and band-pass as well. No self-oscillation, but it gets crazy agressive and wobbly at high resonance levels - and this is what its known for. Nice to have a build-in attenuator for the second CV input. The aesthetic is simply fantastic, thanks to its juicy yellow color the module really stands out among others. The only thing it could use would be a CV input for resonance or filter type mix, but even without that the module is still amazing. Super cheap, too! Do not hesitate, just get this beauty.