I bought one of the FoxPro Firestorms last fall for critters. It seems that is all we have left around here, all predators and no small game. Didn't have any luck calling gray foxes last season, but Dad and I had some fun calling crows and some buddies and I had our eyes opened one night. We did a set in the middle of the woods that you couldn't see very good. Called in a coon on kitten distress, then switched to cotton tail distress and had a huge barn owl fly into a tree 20 feet away. Thank goodness he hooted at us twice, we shined the red light up at him and he was there ruffling his feathers like he was ready to attack. Rotten devil followed us around the next 3 hours.
Another note for you guys, electronic calls can scare the crap out of women. We got back to my buddies house about 11:30PM. His wife and best friend's fiance were watching tv. Snuck inside, set the call in the stairway, and set it to angry bobcat. Scared both girls and the poodle.