So, I'm considering getting one of these but wanted people's opinions. The reasons I'm considering this is because while I'm at work the dogs are crated, which would be fine if no one was home because they are quiet then. But, when people are home and out of the room they are rather vocal and my sister is about ready to kill them. So I would like to set one up outside the crate to allow my sister to reward remotely for quiet. I also would like it for when people come home to reward AWAY from anyone for calmness. So, who has one of these? Do you use it for other things? I would like to use it for more than two things if possible since it's not the cheapest. Do you recommend it?