seriously, use one on every channel, or at least on all drum channels so you don´t fuck up your phase. Or you can use the time adjuster... but I consider it to be a major PITA.
I finally messed around with it a bit today, mostly the EQ, and maybe I'm just making it up, but it seemed to be a whole lot smoother sounding than the Waves Renaissance or Q10. If I buy it by tomorrow I get like $50 off.