So far, I think it is working. I spent some time this evening taking what I've grown so far and inoculating some more cardboard. I think I will need more if I want to grow the actual mushrooms. I hope to have the post ready within the next couple of days.
I did read some about growing oyster mushrooms in coffee grounds. Are you going to give it another try?
Someday I will, for sure. Right now it's not really a priority and I also got a couple of inoculated wooden logs for Christmas, so I'm good for now :-)