Easily the best modular synth plugin by a wide margin. Voltage module development is happening A LOT faster than its competitors. The interface is a better and more intuitive by a landslide (yes, you can drag modules between other modules, and they'll make room like you'd expect; Softube's doesn't do that, which is quite frustrating). The features that have been added to Voltage since its launch are staggering. Voltage can also host other plugins with an impressive level of integration in regard to both audio and modulation. Turn every other synth plugin you own into a powerful module without leaving Voltage or your DAW. Voltage also offers a friendly interface for developing your own modules, which is a great way to learn Java while you're at it. I cannot say enough great things about Voltage. It's a synth head's dream.