Same question here... just in case, I take the liberty to repeat my post from the mixpack forum, since it seems to be the same for me with Easyverb. Working in Logic 8.02, Mac G5 ppc dual 2.5, 4G RAM, OSX Tiger 10.4.11.

Projects in 44.1Khz 24bit. The balance between the two cores is particularly bad, PSPs seeem to be allocated on one proc only and are maxing out incredibly fast (4 instances from mixpack + 2 easyverb pretty much max out).

Very satisfied with the quality of the plugs, besides.