What if the door is already open when I come home? Will it close it?auto open is fantastic and worth the $300 imo.
you train the car where it should send the signal and the distance away from that point. depending on your situation, it may take a little experimenting to find the optimal settings. in my case, our house is on the entrance corner of our neighborhood so I have the distance set low so that driving by the house doesn't send the open command. it gives you the ability to abort the commands but you need to be quick and hit the little stop button at the right moment.
I don't use auto close because I don't think it is safe enough in our situation.