The slate plugins, I'm pretty impressed with them. They sound great. But very very cpu hungry. I had to freeze (bounce, basically) a bunch of tracks and double my buffer size to keep the sound from cutting out. I think I'm gonna have to get a better machine or save the plugins for late in the mixing. I've got them in tracks while recording and a couple times my cpu was so busy it just stopped the daw and flashed an angry message.
I just got a 24 bit interface at the same time so that could be part of the issue too. (I used to use 16/44 or 16/48 now it's 24/96).