I responded on another thread that I used one a few times, but didn't notice any crows responding or the ones that did respond to my set-up didn't seem to pay any attention to the MoJo. I ended up selling it to a guy that already had one and thought they worked great.
I use a MoJo duck decoy and know that they work pretty well so maybe I didn't give the crow decoy enough of a chance? It was one more thing to carry and set up and I decided it wasn't worth it, but I don't run and gun, so maybe you'd like it.