The Tau Pro definately does what it's supposed to, and it does if very reliably. This is a good synth, but it doesn't justify its price in today's VST environment. For $35, you can get much, much more. Unfortunately it's not a very flexible general synthesizer. There are no envelopes, for example, making swelling-type sounds impossible to create. If you're looking for a 303 emulation, there is at least one VST available that is much more convincing. Search the forums for the latest if you're looking for a 303. If you a want general synth, you can get dozens of freebies that sound just as good, are much more flexible, better supported, and well, are free. This synth is also missing some convenience features that are assumed on typical VSTs nowadays: patch management, midi learn for CC control. The Tau was amazing in its day, but that time has passed and the developer has not continued improving it to keep up with the competition. One nice thing is that there are tons of presets available, a testament to the Tau's ease-of-use.