Just downloaded the HY-Filter and thought I would give it a quick review, in hopes that it will help others who may be considering downloading it. I am using the HY-Filter in Presonus Studio One Artist in a 64-bit environment. The HY-Filter will, without a doubt, become an absolutely indispensable part of my production flow. It has a clean, punchy sound and the controls are all super responsive. The best part is, the HY-Filter does not appear to be very processor-intensive, drawing an average of between 1-5% of CPU usage, when activated. The one and only downside I see to the HY-Filter is that there does not appear to be any way to control it using automation. If there is a way, I have not found it, so this reduces the functionality of the filter as more of a sweep generator, or for notching out some unwanted frequencies, rather than an effect that can be used to give a track some cool motion. Overall, this is a great-sounding processor, but there is some definite room to grow, in terms of features. Give it a go and be impressed by its huge sound.