Narcotic is one of the best creative effects plugins out there, right up there with Tantra and Tantra 2. It does require some CPU but not an excessive amount. You can interact with the results in some expressive ways too, its not just a matter of canned presets - if I'm going for a particular sound that I have in my head I can totally get involved in shooting for that using the decent selection of controls in the interface. The choices all make sense, and the LFO and sequencing works flawlessly. I got it on sale for $99 and wasn't disappointed in the least.