Just don't trust them to always trigger when there's a deer or anything else in the area. Last night I was in a bow stand that has a camera (Moultrie) pointed at the trail. Had a little fork horn come through and spend several minutes right in front of the camera at less than 10 yards. A little later a young doe spent quite a while in the same area, most of it withing 15 yards directly in front of the camera. Not long after that, another doe came through the same spot and I shot her at 12 yards from the camera. Checked the camera card this morning and had one picture of the fork horn, one of the younger doe, and none of the one I shot even though it was in the sweet spot for a couple minutes. It did get one of me as I walked through the field of view to pick up my arrow. All in all, the 3 deer spent 15-20 minutes in front of the camera and I got 2 pictures total. I've got it set for single picture, 30 second delay.