The system that I'm running the Waves Ltd. Z-Noise plug-in on is running Pro Tools LE 8. I've got a Mac Book Pro lap top that has a 2.2 Ghz Intel Core 2 Duo processor and 4 GB of RAM where I'm running Pro Tools LE 8 with a Digi 002R audio interface. I have only been using this plug-in moderately here and there when I need to get rid of noise, and for these purposes the system I've got does a fine job of running it as I can't say I've had any issues with it at all.
The Waves Ltd. Z-Noise is definitely one of the most comprehensive noise reduction plug-ins on the market. It's limitless in what it can achieve if you know how to use it, and even if you don't know it well it's still pretty simple to use and to get it to do the basic job. Of course it can get tricky the more you want to get specific with it, but the more you use it the easier it gets to use. Of all the Waves Restoration plug-ins, this would have to be my favorite as I find it to be the most flexible while sharing that pristine filtering that the other plug-ins in the bundle have as well. If you're looking for the plug-in to help you cut out unwanted noise in music, sound design, and beyond, look no further than Waves' Z-Noise.