I do not have one but have hunted over others quite a few times. They are either really good or really bad. They seem to always work well on teal early. I have seen them flare birds badly and then have birds land on them the next time by. Also have to be careful on placement. If you place on the edge you may pull birds away from the landing zone.
I think there is a remote you can add to them, I would invest it one.